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GS Paper: GS3

  • IIT-D demonstrates Quantum Communication over 1 Km

    Why in the News?

    The Defence Ministry announced a breakthrough as IIT-Delhi and DRDO scientists successfully demonstrated quantum communication over 1 km in free space.

    What is Quantum Communication?

    • It is a new way of sending messages so safely that no one can secretly listen in.
    • It uses the laws of quantum physics, especially something called quantum entanglement, to make sure that if someone tries to spy on your message, you’ll know immediately.
    • In quantum entanglement, two tiny particles (like photons of light) are connected in a mysterious way—whatever happens to one instantly affects the other, even if they’re far apart.
    • Because of this, if someone tries to distort one particle, it changes, and the system knows the message isn’t safe anymore.
    • This makes quantum communication perfect for defence, banking, and sensitive messages that must stay secret.

    Quantum Key Distribution (QKD) – Explained Simply:

    • Imagine you want to lock a box and send it to your friend, but you also want them to have the key—without anyone else being able to copy it.
    • QKD is a special way to share that key safely, using quantum particles instead of metal keys.
    • Two people use entangled particles to create the same secret key, without anyone else knowing it.
    • If someone tries to intercept the key while it’s being shared, the particles will show signs of disturbance, and the system will know to discard it and try again.
    • Once both people have the same key, they can use it to lock and unlock messages using regular encryption tools.
    • QKD doesn’t send the actual message—it just safely shares the key that keeps messages secret.

    What did the IIT-Delhi team achieve?

    • A team led by IIT-Delhi, in collaboration with DRDO, successfully demonstrated entanglement-based quantum communication over 1 km in free space.
    • This was done within the IIT-Delhi campus and marks a key advancement from previous experiments using only optical fibre.
    • The demonstration achieved a secure key rate of 240 bits per second and maintained a quantum bit error rate (QBER) of under 7%, which is considered acceptable for real-world QKD.
    • This capability is a step toward achieving satellite-to-ground quantum communication, enabling encrypted keys to be distributed across vast regions without physical links.

    India’s Quantum Communication Journey So Far:

    • In 2022, Prof. Kanseri’s team first demonstrated quantum communication between Vindhyachal and Prayagraj.
    • In 2023, they expanded this capability to 380 km using standard telecom fibre, achieving a low QBER of 1.48%.
    • By 2024, the team established a QKD link spanning over 100 km of optical fibre, further pushing the reliability and reach of India’s quantum infrastructure.
    • These achievements are part of India’s larger effort under the National Quantum Mission (2023–2031), which has a budget of ₹6,000 crore to support R&D and deployment in quantum computing, sensing, and communication.
    • India now joins an elite group of nations—alongside China and the US—actively building toward a quantum-secure internet, with potential applications in defence, finance, telecom, and cybersecurity.

     

    [UPSC 2025] Consider the following statements:

    I. It is expected that Majorana 1 chip will enable quantum computing. II. Majorana 1 chip has been introduced by Amazon Web Services (AWS). III. Deep learning is a subset of machine learning.

    Which of the statements given above are correct?

    Options: (a) I and only I (b) II and III only (c) I and III only* (d) I, II and III

     

  • [20th June 2025] The Hindu Op-ed: Why India should address its propulsion gap

    PYQ Relevance:

    [UPSC 2020] What is the significance of Indo-US defence deals over Indo-Russian defence deals? Discuss with reference to stability in the Indo-Pacific region.

    Linkage: The question regarding Indo-US and Indo-Russian defense deals is relevant because India’s propulsion gap directly influences its choices and reliance on these foreign defense partners for critical military hardware like engines. Addressing the propulsion gap would reduce this dependency, enabling India to better assert its strategic autonomy and contribute to regional stability (such as in the Indo-Pacific) without being constrained by external supply chain pressures or technology transfer limitations from other nations.

     

    Mentor’s Comment:  India’s Advanced Medium Combat Aircraft (AMCA) project is moving ahead quickly and is seen as a big step forward for the country’s aerospace sector. However, the excitement is being held back by a long-standing reliance on foreign engines. This same problem had earlier affected the HF-24 Marut and is now also troubling the LCA and AMCA fighter jet programs. Even after years of work and investment — including the unsuccessful Kaveri engine project and delays in getting engines from GE — India still depends heavily on other countries for engine technology. This not only affects military preparedness but also raises serious concerns about India’s ability to act independently in defence matters.

    Today’s editorial analyses the development of Indian fighter aircraft engines. This content would help in GS Paper II (International Relations) and GS Paper III (Science & Technology) in the mains Paper.

    _

    Let’s learn!

    Why in the News?

    Recently, there is growing excitement around India’s AMCA stealth fighter, seen as a major aerospace milestone. However, concerns remain due to a long-standing reliance on imported engines since the HF-24 Marut.

    Why has India failed to develop its own jet engine? 

    • Technological Challenges in Engine Design: Jet engines require high thrust-to-weight ratios, thermal stability, and advanced metallurgy, which India has struggled to achieve. Eg: The Kaveri GTX-35VS engine, under development since 1989 by DRDO-GTRE, failed to meet performance benchmarks in thrust and thermal management even after 3,000 hours of testing.
    • Lack of Core Materials and Manufacturing Capability: India lacks access to critical technologies like single-crystal turbine blades, thermal barrier coatings, and advanced cooling systems, essential for high-performance engines. Eg: Negotiations with GE for F414 engine hit a roadblock because GE refused full transfer of these core technologies despite India’s demand.
    • Fragmented and Short-Term Funding: Defence R&D funding in India is project-specific and often lacks a long-term strategic vision, affecting continuity and innovation in complex projects. Eg: Despite spending over ₹2,032 crore on the Kaveri project over 35 years, no operational engine was produced due to inconsistent support and shifting goals.
    • Over-Reliance on Foreign Engines: Dependence on foreign suppliers has created a complacency in indigenous R&D, slowing domestic capability-building. Eg: India continues to rely on GE F404 and F414 engines for its LCA Tejas variants, instead of pursuing an urgent push for domestic alternatives.
    • Institutional Inertia and Missed International Collaborations: Bureaucratic rigidity and institutional pride have caused India to reject key collaborative opportunities for engine co-development. Eg: A proposed joint project with Safran (France) for developing an engine for AMCA and Tejas MkII was reportedly declined by DRDO.

    What is HF-24 Marut?

    The HF-24 Marut (meaning “Spirit of the Tempest”) was India’s first indigenously designed and built fighter jet, developed in the 1950s and 1960s by Hindustan Aeronautics Limited (HAL).

    What caused the HF-24 Marut’s underperformance?

    • Underpowered Engine: The Marut was equipped with British Bristol Siddeley Orpheus 703 turbojets, which lacked the thrust needed for supersonic performance. Eg: Designer Kurt Tank had envisioned a more powerful engine, but it never materialised, severely restricting the aircraft’s speed and payload capabilities.
    • Failure to Acquire Suitable Alternatives: Despite multiple attempts, India could not procure or co-develop a more suitable engine to enhance the Marut’s performance. Eg: Efforts to source a better engine from Egypt and Germany failed, leaving the Marut stuck with the underpowered Orpheus units.
    • Operational Limitations in Combat: The aircraft performed well in ground-attack roles, such as in the 1971 war, but its overall combat effectivenesswas limited by its propulsion shortfall. Eg: Indian Air Force veterans cited that the engine limitation was the Marut’s Achilles’ heel, preventing it from evolving into a full-spectrum fighter.

    How does engine import dependency impact India’s defence?

    • Delays in Defence Production and Induction: Dependency on foreign engines leads to project delays when there are supply chain issues or export restrictions. Eg: Delivery of 99 General Electric F404 engines for the LCA Mk1A was delayed by 13 months, pushing back aircraft induction timelines.
    • Limited Operational and Strategic Autonomy: India becomes vulnerable to geopolitical pressures and foreign policy decisions of engine-supplying nations. Eg: U.S. reluctance to share core technologies like single-crystal turbine blades restricts India’s ability to upgrade or export its fighter aircraft.
    • Constraints on Defence Exports: Exporting platforms equipped with foreign engines requires third-party approvals, limiting India’s potential in global defence markets. Eg: India’s ability to export Tejas is restricted by U.S. controls on the GE F404 engine, limiting defence diplomacy options.

    What are the steps taken by the Indian Government? 

    • Strategic Collaborations for Technology Transfer: India has initiated joint ventures and international collaborations to acquire advanced propulsion technology. Eg: During PM Modi’s 2023 U.S. visit, HAL signed a deal with General Electric to co-produce GE F414 enginesin India for the LCA Mk2 and AMCA programs.
    • Revival of Indigenous Engine Projects: The government has revived and restructured efforts to develop indigenous jet engines under DRDO’s GTRE. Eg: The Kaveri engine project was decoupled from the LCA program and is being explored for use in UAVs and future aircraft with potential foreign assistance.
    • Promotion of Atmanirbhar Bharat in Defence: The Defence Ministry has prioritized self-reliance in critical technologies, including aero-engines, under the Atmanirbhar Bharat initiative. Eg: Several defence PSUs and private players have been incentivized to develop components and sub-systemsfor aerospace platforms under Make in India schemes.

    What must India do to achieve propulsion self-reliance? (Way forward)

    • Establish Strategic Global Partnerships for Technology Transfer: India must engage in joint ventures with trusted international engine manufacturers to acquire critical technologies like single-crystal turbine blades and thermal barrier coatings. Eg: The proposed GE-HAL deal to manufacture the F414 engines in India should ensure full transfer of know-how to avoid long-term dependency.
    • Develop an Integrated Indigenous R&D Ecosystem: India needs to create a cohesive framework connecting DRDO, GTRE, academia, and private industry to focus on advanced propulsion R&D with long-term investment. Eg: Encouraging private sector participation in defence through the Innovations for Defence Excellence (iDEX)platform can accelerate jet engine innovation.

     

  • All about the revised Green India Mission to increase forest cover, address climate change

    Why in the News?

    The revised plan for the Green India Mission (GIM), released by the Centre on June 17, is an important step forward in India’s fight against climate change.

    What are the achievements of the Green India Mission since its launch in 2014?

    • Large-scale Afforestation Activities: GIM facilitated tree plantation and afforestation across 11.22 million hectares between 2015–16 and 2020–21. Eg: Afforestation under state schemes in Andhra Pradesh and Telangana helped increase green cover.
    • Support to Vulnerable States: Funds were allocated based on ecological vulnerability and restoration potential. Eg: ₹624.71 crore released to 18 states between 2019–24, with ₹575.55 crore utilised.
    • Carbon Sequestration Contribution: Contributed to creating an additional carbon sink of 2.29 billion tonnes of CO₂ equivalent between 2005–2021. Eg: Forest restoration in Jharkhand and Chhattisgarh aided national climate goals.
    • Integration with Climate Goals: GIM aligned with India’s international commitment to restore 26 million hectares of degraded land by 2030. Eg: Activities under GIM complement India’s UNFCCC goals on land restoration and carbon capture.
    • Livelihood Enhancement through Forest-Based Interventions: Helped improve livelihoods of forest-dependent communities via sustainable forestry practices. Eg: Community plantation models in Odisha created jobs and promoted conservation.

    What are the key elements of the revised Green India Mission roadmap?

    • Landscape-level restoration: Focus on saturation-based, area-specific restoration in vulnerable landscapes like the Aravallis, Western Ghats, Himalayas, and mangroves.
    • Integration with flagship projects: Syncing with initiatives like the Aravalli Green Wall project (cost: Rs 16,053 crore, coverage: 6.45 mha across 29 districts and 4 states).
    • Aravalli protection: Targeting 8 lakh hectares for forest, water system and grassland rejuvenation to curb sandstorm intrusions and pollution in NCR and Punjab.
    • Western Ghats focus: Addressing illegal mining and deforestation through afforestation and abandoned mine rehabilitation.

    Why was the Green India Mission’s roadmap revised?

    • To Address On-Ground Climate Impacts: The revision was made to respond to changing climate conditions and the increasing urgency of land degradation and desertification. Eg: Inclusion of the Aravalli Green Wall Project to counter desert expansion from the Thar region.
    • To Incorporate Feedback from States and Scientific Bodies: The revised plan reflects inputs from implementing states and scientific institutions, ensuring region-specific solutions. Eg: Feedback led to the addition of eco-restoration of abandoned mining areas in the Western Ghats.
    • To Focus on Region-Specific Restoration Practices: The update prioritises landscape-specific and ecologically appropriate restoration in vulnerable ecosystems. Eg: Special emphasis on Himalayas, mangroves, and degraded zones for carbon sequestration and biodiversity conservation.

    What key regions will it now focus on?

    Who is implementing the Green Wall project?

    • Central Government Leadership: The Centre (Government of India) is spearheading the initiative, allocating funding and coordinating implementation across states. Eg: The project’s ₹16,053 crore budget and planning is directed by central agencies in collaboration with local authorities.
    • Collaboration with States and Scientific Institutions: Implementation involves three states (Haryana, Rajasthan, Gujarat), one UT (Delhi)  and guidance from the Wildlife Institute of India (WII), using ecological data to target 12 degradation gaps in the Aravalli range. Eg: WII studies identified dust-prone regions; restoration covers 8 lakh hectares across 29 districts in these states.

    How will GIM address land degradation and carbon sequestration?

    • Restoration of Degraded and Open Forests: GIM focuses on restoring impaired open forests, which is a cost-effective and high-impact method for carbon dioxide (CO₂) sequestration. Eg: As per the Forest Survey of India (FSI), restoring 15 million hectares can sequester 1.89 billion tonnes of CO₂.
    • Region-Specific Ecological Interventions: The revised roadmap includes landscape-specific afforestation and eco-restoration in vulnerable areas like the Aravallis, Western Ghats, Himalayas, and mangroves. Eg: Under the Aravalli Green Wall Project, 8 lakh hectares will be restored to combat desertification and reduce dust pollution.
    • Expansion of Natural Carbon Sinks: GIM aligns with India’s climate commitment to create an additional carbon sink of 2.5 to 3 billion tonnes of CO₂ by 2030. Eg: By integrating schemes and intensifying plantation efforts, GIM aims to expand forest and tree cover up to 24.7 million hectares, capturing 3.39 billion tonnes of CO₂.

    Way forward: 

    • Integrated Landscape-Based Planning: Adopt a holistic, ecosystem-specific approach by aligning GIM with other environmental programs (e.g., CAMPA, MGNREGS) for coordinated restoration and afforestation efforts.
    • Enhanced Monitoring and Community Participation: Use technology (GIS, remote sensing) for real-time progress tracking, while empowering local communities and forest-dependent groups for sustainable upkeep and livelihood generation.

    Mains PYQ:

    [UPSC 2020] Examine the status of forest resources of India and its resultant impact on climate change.

    Linkage: This question directly relates to the core objectives and context of the Green India Mission (GIM). The GIM, launched in 2014, is a crucial component of India’s efforts to combat climate change by increasing forest and tree cover and restoring degraded ecosystems. The revised roadmap for GIM emphasizes not only increasing and restoring forest and green cover but also tackling land degradation and desertification, which are significant environmental issues in India.

  • FASTag Annual Pass Scheme

    Why in the News?

    Union Transport Minister announced a new FASTag-based Annual Pass system for private non-commercial vehicles (cars, jeeps, vans) to ensure smoother travel across National Highways.

    What are FASTags?

    • FASTag is a contactless toll payment system that uses Radio Frequency Identification (RFID) technology to enable automatic toll collection at National Highway toll plazas.
    • Managed by the National Highways Authority of India (NHAI) and National Payments Corporation of India (NPCI), it was launched in 2014 and became mandatory in 2021 for all four-wheeled vehicles.
    • It is a sticker affixed on a vehicle’s windshield, linked to a prepaid wallet or savings account. Toll charges are automatically deducted when the vehicle passes through an electronic toll gate.
    • It enhances convenience, reduces traffic congestion, and promotes digital payments across India’s highway network.
    • As per the Motor Vehicles Rules, FASTags are mandatory for all new four-wheelers and necessary for renewal of fitness certificates and national permits.

    About the FASTag Annual Pass Scheme:

    • Overview: It is a new initiative announced by the Ministry of Road Transport and Highways to provide cost-effective and hassle-free travel for private non-commercial vehicles.
    • Implementation: The pass will be effective from August 15, 2025, and is optional, intended for cars, jeeps, and vans (not for commercial vehicles).
    • Objectives: The scheme is designed to reduce per-trip costs (as low as ₹15/toll) and provide savings of up to ₹7,000 annually for frequent travelers.
    • Benefits: It allows unlimited passage at National Highway (NH) and National Expressway (NE) toll plazas for either:
      • One year, or
      • 200 toll crossings, whichever is earlier.

    Key Features:

    • Eligibility: Applicable only for non-commercial private vehicles with a valid, active FASTag linked to a registered vehicle number.
    • Activation: Can be activated via the Rajmargyatra mobile app or NHAI website with a one-time payment of ₹3,000 for FY 2025–26.
    • Validity: Covers 200 trips or one year and then reverts to regular FASTag mode unless renewed.
    • Trip Count:
      • Point-based plazas: Each pass counts as one trip per crossing.
      • Closed toll systems: Entry and exit combined count as one trip.
    • Transfer Restrictions: The pass is non-transferable and valid only for the vehicle on which the FASTag is registered.
    • Coverage: Valid only at NH and NE toll plazas managed by the Centre. It does not apply to state highway or local toll plazas.
    • Fee Revision: The base fee may be revised annually starting April 1 every year.
    • Existing Users: No need for a new FASTag if one is already affixed and active. The pass can be added on top of the existing tag after eligibility verification.
    [UPSC 2023] With reference to India’s projects on connectivity, consider the following statements:

    1. East-West Corridor under Golden Quadrilateral Project connects Dibrugarh and Surat.

    2. Trilateral Highway connects Moreh in Manipur and Chiang Mai in Thailand via Myanmar.

    3. Bangladesh-China -India -Myanmar Economic Corridor connects Varanasi in Uttar Pradesh with Kunming in China. How many of the above statements are correct? Options: (a) Only one (b) Only two (c) All three (d) None*

     

  • Navy inducts INS Arnala

    Why in the News?

    INS Arnala, the first Anti-Submarine Warfare Shallow Water Craft (ASW-SWC), was officially commissioned into the Eastern Naval Command at the Naval Dockyard, Visakhapatnam.

    About INS Arnala:

    • What is it: INS Arnala is the first Anti-Submarine Warfare Shallow Water Craft (ASW-SWC) commissioned into the Eastern Naval Command on June 18, 2025, at Visakhapatnam.
    • Behind the name: It is named after the historic Arnala Fort near Vasai, Maharashtra.
    • Development: The vessel was designed by Garden Reach Shipbuilders & Engineers (GRSE) and built in partnership with L&T Shipbuilders under a Public-Private Partnership (PPP) model.
    • Project: It marks the beginning of the induction of 16 ASW-SWC class ships, aimed at enhancing India’s shallow water anti-submarine capabilities.

    Key Features:

    • Propulsion: 77.6 metres long; first Indian Navy warship powered by a Diesel Engine-Waterjet combination.
    • Indigenous Content: Over 80% indigenous systems, with contributions from BEL, L&T, Mahindra Defence, and over 55 MSMEs.
    • Arsenal: Equipped with a single centreline rocket launcher, lightweight torpedoes, anti-torpedo decoys, and mine-laying systems.
    • Sensor Suite: Incorporates Hull-Mounted Sonar (Abhay), Low-Frequency Variable Depth Sonar (LFVDS), and Underwater Acoustic Communication System (UWACS).
    • Multi-role Capability: Designed for ASW operations, Search and Rescue (SAR), low-intensity maritime operations, and subsurface surveillance in shallow coastal waters.

    Significance:

    • Strategic Defence Upgrade: Replaces ageing Abhay-class corvettes and significantly strengthens India’s anti-submarine warfare posture.
    • Enhanced Coastal Security: Ideal for detecting midget submarines and Unmanned Underwater Vehicles (UUVs) in waters less than 30 metres deep, where larger warships struggle to operate.
    • Make-in-India Milestone: Demonstrates India’s growing self-reliance in defence manufacturing and contributes to the Aatmanirbhar Bharat initiative.
    [UPSC 2016] Which one of the following is the best description of ‘INS Astradharini’, that was in the news recently?

    Options: (a) Amphibious warfare ship (b) Nuclear-powered submarine (c) Torpedo launch and recovery vessel* (d) Nuclear-powered aircraft carrier

     

  • What is Reverse-Flipping?

    Why in the News?

    SEBI has introduced key regulatory relaxations to ease IPO norms and incentivize startups to shift their legal base back to India through reverse-flipping.

    About Reverse-Flipping:

    • Reverse-flipping refers to the process by which Indian startups that were earlier incorporated abroad shift their domicile back to India, making India their legal and operational headquarters.
    • It allows Indian companies to access domestic capital markets, reduce compliance complexity, and align with the evolving global tax and regulatory environment.
    • This shift helps startups tap Indian stock exchanges, reduce reliance on foreign jurisdictions, and benefit from a favorable Indian regulatory ecosystem.

    Types of Reverse-Flipping

    1. Share Swap Arrangement:
      • In this structure, shareholders of the foreign parent company exchange their shares for shares in the Indian subsidiary.
      • This process may trigger capital gains tax under the Income Tax Act, 1961, especially for Indian shareholders.
    1. Inbound Merger (Cross-Border Merger):
      • The foreign parent company merges with its Indian subsidiary, with the Indian entity becoming the surviving legal structure.
      • If all conditions under the Foreign Exchange Management Act (FEMA), the Companies Act, 2013, and National Company Law Tribunal (NCLT) are met, this merger route can be tax-neutral.

    Key Features:

    • Domestic Listing Access: Startups gain access to Indian IPO markets and valuations.
    • Simplified Compliance: Reduced legal and regulatory complications from operating across jurisdictions.
    • Investor Incentives: SEBI now allows foreign venture funds and AIFs to be counted towards minimum promoter contribution in public issues.
    • ESOP Relaxation: SEBI has allowed promoters/founders to retain Employee Stock Option Plans (ESOPs) granted one year prior to the filing of the Draft Red Herring Prospectus (DRHP).
    • Capital Market Boost: The move supports India’s goal to become a global startup and financial hub by encouraging reverse-flipping.
    • Tax & Legal Alignment: Shifting domicile can help startups comply better with Indian tax and business laws.

    Note:

    Employee Stock Option Plans (ESOPs) are structured benefit schemes that grant employees the right to purchase shares of their company at a predetermined price—known as the exercise price—after completing a specific period.

     

    [UPSC 2025] Consider the following statements:

    Statement I: As regards returns from an investment in a company, generally, bondholders are considered to be relatively at lower risk than stockholders.

    Statement II: Bondholders are lenders to a company whereas stockholders are its owners.

    Statement III: For repayment purpose, bondholders are prioritized over stockholders by a company.

    Which one of the following is correct in respect of the above statements?

    (a) Both Statement II and Statement III are correct and both of them explain Statement I *

    (b) Both Statement I and Statement II are correct and Statement I explains Statement II

    (c) Only one of the Statements II and III is correct and that explains Statement I

    (d) Neither Statement II nor Statement III is correct

     

  • PM-WANI Scheme

    Why in the News?

    The TRAI ordered that public Wi-Fi hotspot operators under PM-WANI programme should not be charged more than twice what a residential broadband user paid for setting up a hotspot.

    What is the PM WANI Scheme?

    • Overview: PM Modi launched the Prime Minister Wi-Fi Access Network Interface (PM WANI) in December 2020.
    • Nodal agency: It is an initiative under the Department of Telecommunications (DoT).
    • Objective: To democratize internet access, particularly in remote and underserved areas.
    • Goals: It takes forward the goal of the National Digital Communications Policy, 2018 (NDCP) of creating a robust digital communications infrastructure.
    • Implementation: Leverages Public Data Offices (PDOs) established in public spaces like railway stations, banks, post offices, and more. Users can access the internet via Wi-Fi at these locations without requiring a SIM card.
    • PM-WANI ecosystem consists of four parts: 
      1. Public Data Office (PDO): It establishes the Wi-Fi Hotspots and provides internet access to users
      2. Public Data Office Aggregator (PDOA):  It provides authorisation and accounting services to PDOs.
      3. App Provider: It displays the available hotspots in the phone’s proximity.
      4. Central Registry: This overseen by the Centre for Development of Telematics maintains details of App Providers, PDOs, and PDOAs.
    • How to Utilize PM WANI?
      • To access PM WANI services, users must install the Data PM WANI app on their smartphones.
      • Through the app, users can connect to nearby public Wi-Fi PDOs.
      • This application facilitates seamless connectivity to PM-WANI-compliant Wi-Fi hotspots, empowering users to access broadband services conveniently.

    Role of Public Data Offices (PDOs):

    • The PM-WANI scheme includes a provision for establishing Public Data Offices (PDOs) by rural entrepreneurs in remote regions.
    • These PDOs procure internet bandwidth from telecom service providers or ISPs to offer Wi-Fi services at minimal charges.
    • This model enables individuals to access the internet even in areas with limited or no data connectivity.
    [2018] Which of the following is/are the aim/aims of “Digital India” Plan of the Government of India?

    1. Formation of India’s own Internet companies like China did.
    2. Establish a policy framework to encourage overseas multinational corporations that collect Big Data to build their large data centres within our national geographical boundaries.
    3. Connect many of our villages to the Internet and bring Wi-Fi to many of our school, public places and major tourists.

    Select the correct answer using the codes given below:

    (a) 1 and 2 only

    (b) 3 only

    (c) 2 and 3 only

    (d) 1, 2 and 3

     

  • Rice reveals surprise ability to adapt to cold faster than evolution 

    Why in the News?

    In a major study, scientists proved that cold exposure in rice plants can cause changes that improve stress tolerance and are inherited by the next five generations, supporting Lamarck’s old theory.

    What was Lamarck’s theory of acquired characteristics?

    This idea was formally presented by Jean-Baptiste Lamarck in 1809, and it was one of the earliest theories of evolution. When the traits developed during an organism’s lifetime due to use, disuse, or environmental influence could be inherited by its offspring. Eg: A giraffe stretching its neck to reach higher leaves would result in its offspring having longer necks.

    How did later scientific discoveries challenge it?

    • Weismann’s Tail-Cutting Experiment: August Weismann demonstrated that acquired traits are not inherited by cutting the tails of mice for five generations, yet their offspring were still born with tails.
    • Mendel’s Laws of Heredity: Gregor Mendel showed that traits are inherited through stable units (genes) passed unchanged from parents to offspring, rather than traits acquired during life. Eg: In pea plants, traits like flower colour were inherited predictably, regardless of environmental changes.
    • Discovery of DNA and Mutations: The discovery of DNA as the genetic material and that mutations cause heritable changes explained inheritance scientifically, without relying on acquired characteristics. Eg: Genetic disorders like sickle cell anemia are caused by specific DNA mutations, not by environmental use or disuse.

    How did Mendel’s work and DNA discovery change heredity understanding?

    • Introduction of Stable Hereditary Units: Mendel’s experiments introduced the concept of “genes” as stable, particulate units of inheritance passed from parents to offspring. Eg: Mendel’s pea plant experiments showed traits like seed shape and flower color followed predictable patterns.
    • Law of Segregation and Independent Assortment: Mendel proposed that alleles segregate independently, ensuring genetic variation without influence from acquired traits. Eg: A plant with one tall and one short gene could pass either to its offspring, not a mix of the two.
    • DNA Identified as Genetic Material: Later discoveries identified DNA as the carrier of genetic information, solidifying the molecular basis of heredity. Eg: Avery, MacLeod, and McCarty’s experiments in 1944 showed that DNA—not proteins—was responsible for heredity.
    • Mutation Explained Heritable Variation: The understanding that mutations in DNA cause changes in traits clarified how new heritable variations arise. Eg: Mutations in the hemoglobin gene lead to sickle cell anemia, a heritable disorder.
    • Disproved Lamarckian Inheritance: These findings rejected the idea that characteristics acquired during life could be inherited, as proposed by Lamarck. Eg: A bodybuilder’s muscular physique isn’t passed to their children genetically.

    Why is the Cell study on cold-tolerant rice significant?

    • Proof of Heritable Epigenetic Change Induced by Environment: The study demonstrated that cold exposure triggered an epigenetic modification (methylation) in rice plants, which was inherited for five generations. Eg: Rice plants exposed to cold passed on improved cold tolerance without any DNA sequence change.
    • Reinforced the Role of Epigenetics in Evolution: It showed that gene expression can be regulated by epigenetic marks rather than genetic mutations, suggesting Lamarck’s idea of environmental inheritance has merit. Eg: The ACT1 gene stayed active in cold-tolerant rice due to the absence of a methylation tag, helping them survive cold stress.
    • New Direction for Crop Improvement and Climate Resilience: The findings open doors for non-genetic crop adaptation methods to deal with climate change. Eg: Epigenetically trained rice varieties could be developed to withstand colder environments, improving food security.

    What are the steps taken by the Indian Government? 

    • Multigenerational Cold-Stress Breeding: Researchers implemented a directional selection process over multiple generations by exposing rice to cold during the vulnerable meiotic stage, breeding for improved cold resistance. Eg: After three generations, they developed rice lines with stable cold tolerance that persisted for at least five generations.
    • Epigenetic Mapping and Editing of the ACT1 Promoter: Through multi-omics analysis, scientists identified hypomethylation at the ACT1 promoter as the molecular basis for cold adaptation. They then used precision DNA methylation editing to confirm that removing methyl tags restored cold tolerance.  

    Way forward:

    • Incorporate Epigenetic Breeding in National Crop Improvement Programs: Government research bodies and agricultural universities should integrate epigenetic trait selection and editing into mainstream breeding to develop climate-resilient varieties, especially for stress-prone regions.
    • Strengthen Investment in Multi-Generational Stress Trials: Increase funding for long-term, controlled environment trials to identify and stabilize heritable epigenetic traitsacross major crops, ensuring sustainable food security under climate change.

    Mains PYQ:

    [UPSC 2019] How can biotechnology improve the living standards of farmers?

    Linkage: The core of the article reveals a novel mechanism for plant adaptation—epigenetic inheritance of cold tolerance in rice plants. This scientific breakthrough, falling under the broad umbrella of biotechnology, demonstrates a potential pathway to develop crops that can adapt to challenging environmental conditions (like cold stress) more rapidly than through traditional breeding or genetic modification.

  • What is Project Vishnu? 

    Why in the News?

    India is set to test the Extended Trajectory-Long Duration Hypersonic Cruise Missile (ET-LDHCM), an advanced hypersonic missile developed by DRDO under the secretive Project Vishnu.

    What is Project Vishnu?

    • Overview: Project Vishnu is a top-secret initiative by India’s Defence Research and Development Organisation (DRDO) to develop hypersonic missile technologies.
    • Strategic Purpose: The project aims to enhance India’s strategic deterrence by delivering high-speed missiles capable of both conventional and nuclear roles.
    • Focus: It is specifically designed to counter threats from China and Pakistan, reinforcing regional strike capability.
    • Platform Flexibility: A core feature is multi-platform deployment, allowing the missile to be launched from land, air, and naval systems.
    • Integrated Technologies: It brings together scramjet propulsion, materials science, and precision guidance into a single hypersonic weapons system.
    • Doctrinal Alignment: It reflects India’s shift toward technology-driven warfare and supports its credible minimum deterrence doctrine.

    About the ET-LDHC Hypersonic Missile:

    • Overview: It is the flagship missile system under Project Vishnu.
    • Speed and Range: It reaches Mach 8 (~11,000 km/h) and has a strike range of 1,500 km, making it nearly impossible to intercept with current defence systems.
    • Payload Versatility: It can carry 1,000–2,000 kg of conventional or nuclear warheads, allowing mission-specific configurations.
    • Propulsion: Powered by an indigenously developed scramjet engine, it uses atmospheric oxygen for combustion, improving fuel efficiency and endurance.
    • Strike Capabilities: With evasive manoeuvrability and a flat trajectory, the missile is ideal for deep-penetration and precision attacks.
    • Next-Gen Materials: It is built from materials that withstand 2,000°C+ temperatures, ensuring oxidation resistance and structural integrity.
    • Launch Platforms: The missile is compatible with land systems, fighter jets, and naval vessels, offering operational flexibility.
    [UPSC 2024] Consider the following statements:

    1. Ballistic missiles are jet-propelled at subsonic speeds throughout their flights, while cruise missiles are rocket-powered only in the initial phase of flight.

    2. Agni-V is a medium-range supersonic cruise missile, while BrahMos is a solid-fuelled intercontinental ballistic missile.

    Which of the statements given above is/are correct?

    Options: (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2 *

     

  • First Assembly of the International Big Cat Alliance (IBCA)

    Why in the News?

    The first Assembly of the International Big Cat Alliance (IBCA) was held on June 16, 2025, in New Delhi, with the Union Environment Minister presiding over the session.

    About the International Big Cat Alliance (IBCA)

    • Overview: It is a multi-country, multi-agency alliance of 95 countries, both range and non-range, dedicated to the conservation of big cats and their habitats.
    • Launch: Proposed by PM Modi in 2019, the alliance was officially launched in April 2023 to mark Project Tiger’s 50th anniversary.
    • Conservation Focus: IBCA seeks to protect and restore populations of 7 big cats: tiger, lion, leopard, snow leopard, cheetah, jaguar, and puma.
    • Core Functions: The alliance works through advocacy, knowledge exchange, promotion of eco-tourism, and resource mobilisation.
    • Conflict Resolution: It aims to reduce human-wildlife conflict and restore degraded habitats critical to big cat survival.
    • Global Participation: IBCA brings together 95 range countries from:
      • Asia: India, China, Nepal, Pakistan, Iran
      • Africa: Kenya, Congo, Ghana
      • Americas: Brazil, Ecuador, United States
      • Europe/Central Asia: Russia, Kazakhstan
    • Members: Bhutan, Eswatini, Cambodia, Guinea, India, Liberia, Nicaragua, Somalia and Suriname have deposited an instrument of ratification.
    • Institutional Structure: It is governed by a General Assembly, an elected Council, and a secretariat led by a Secretary-General.
    • Permanent Base: The ratification of the headquarters agreement has enabled IBCA to set up its permanent headquarters in India.

    India’s Role:

    • Species Richness: India is home to 5 of the 7 big cats—the tiger, lion, leopard, snow leopard, and cheetah—and holds 70% of the world’s tiger population.
    • Funding Commitment: The Indian government has committed ₹150 crore (2023–2028) and is attracting additional global contributions to support the alliance’s goals.
    • Conservation Leadership: India plays a leading global role in big cat protection, setting benchmarks in wildlife conservation and ecological stewardship.
    [UPSC 2024] Consider the following statements:

    1. Lions do not have a particular breeding season.

    2. Unlike most other big cats, cheetahs do not roar.

    3. Unlike male lions, male leopards do not proclaim their territory by scent marking.

    Which of the statements given above are correct?

    (a) 1 and 2 only * (b) 2 and 3 only (c) 1 and 3 only (d) 1, 2 and 2