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Subject: Science and Technology

  • Pinaka Long Range Guided Rocket Maiden Flight Test

    Why in the News?

    India successfully conducted the maiden flight test of the Pinaka Long Range Guided Rocket off the Odisha coast. The rocket hit the target with textbook precision at its maximum range of 120 km.

    What is Pinaka LRGR

    • Long range guided rocket ammunition of the Pinaka multi barrel rocket system
      • Evolved from Pinaka Mark II
      • Designed for precision strikes at extended ranges

    Developed by

    • Armament Research and Development Establishment
      • High Energy Materials Research Laboratory
      • Research Centre Imarat
      • Defence Research and Development Laboratory
      • Under Defence Research and Development Organisation

    Key Features

    • Range: Up to 120 km
       • Guidance: Navigation, guidance and control kit for high accuracy
       • In flight manoeuvrability: Executed planned trajectory changes
       • Launcher compatibility: Fired from in service Pinaka launcher
       • Firepower: MBRL can fire 12 rockets in a salvo

    Operational Advantages

    • High accuracy reduces collateral damage
      • Quick reaction time and high rate of fire
       • Effective in low intensity conflict scenarios
       • Multiple Pinaka variants can be launched from the same platform
    [2023] 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? 

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

  • AI that you can hold in your hand, and that holds your hand

    Introduction

    Artificial Intelligence is undergoing a qualitative transformation, from a background computational tool to an active intermediary between humans and the digital world. The AI’s most significant impact is not automation alone, but the rewiring of the internet itself, including how users search, read, decide, and act. As AI becomes embedded in devices, browsers, and daily routines, it is redefining control over data, attention, and economic value in the digital ecosystem.

    Why in the News

    The year 2025 marks a decisive shift in the evolution of artificial intelligence, where AI began directly mediating how users access knowledge on the internet, rather than merely assisting search or productivity. For the first time, AI-powered browsers, devices, and assistants are challenging Google’s long-standing dominance as the internet’s gateway, particularly in emerging markets. This transition represents a sharp break from the earlier search-engine-centric model, as users increasingly receive direct, conversational answers instead of links, disrupting established advertising-based business models. While promised efficiency gains remain uneven, the scale and speed of adoption signal a structural transformation in how information is produced, accessed, and monetised globally.

    How is AI transforming the way people access the internet?

    1. Direct answer delivery: Enables users to receive summarised responses instead of navigating multiple websites, reducing dependence on traditional search links.
    2. Conversational interfaces: Facilitates follow-up questions and contextual clarification, mimicking human interaction rather than keyword searches.
    3. Behavioural shift: Alters user engagement patterns, weakening click-through-rate-based content discovery.
    4. Structural impact: Reconfigures how knowledge is consumed, prioritising synthesis over exploration.

    Why does this shift challenge Google’s dominance?

    1. Search disintermediation: Reduces the need for users to visit Google-indexed websites for answers.
    2. Advertising disruption: Weakens the ad-based revenue model built on page views and link navigation.
    3. Market vulnerability in developing countries: Creates entry points for AI platforms to act as alternative gateways to the internet.
    4. Competitive uncertainty: Introduces a new model where value lies in response quality rather than ranking authority.

    What role do AI-powered devices play in this transition?

    1. Device-level integration: Embeds AI deeply within smartphones and laptops rather than as standalone applications.
    2. Personal assistant evolution: Transforms AI into a system-level interface managing messages, emails, and summaries.
    3. User retention strategy: Ensures constant interaction by making AI central to everyday tasks.
    4. Platform competition: Encourages operating-system-driven AI ecosystems rather than app-based usage.

    How are AI browsers reshaping the architecture of the internet?

    1. AI-first browsers: Prioritise AI responses over traditional webpage navigation.
    2. Content extraction: Pulls information directly from websites without redirecting users.
    3. Publisher impact: Undermines traffic-dependent digital media and independent content creators.
    4. Information centralisation: Concentrates interpretive power in AI systems rather than distributed sources.

    What new forms of interaction are emerging between humans and technology?

    1. Non-visual interfaces: Expands interaction through voice, audio, and ambient computing.
    2. Background operation: Enables AI to function passively while continuously supporting user decisions.
    3. Contextual memory: Allows AI systems to recall conversations, preferences, and behavioural cues.
    4. Human-like assistance: Reduces cognitive load by suggesting next steps instead of presenting raw information.

    Why is “agent orchestration” significant for the future of AI?

    1. Multi-agent coordination: Enables AI to manage multiple tasks and systems simultaneously.
    2. Decision autonomy: Allows AI to execute complex workflows without continuous human input.
    3. Enterprise efficiency: Enhances productivity in organisations managing large data volumes.
    4. Economic projection: Signals rapid market expansion of autonomous AI services by 2026.

    Conclusion

    Artificial Intelligence is no longer a peripheral tool but a central intermediary shaping how knowledge is accessed, processed, and acted upon. As AI restructures the internet from a link-based to an answer-based ecosystem, it creates efficiency gains alongside new challenges of competition, accountability, and data governance. The policy response must therefore balance innovation with safeguards to ensure transparency, fair competition, and equitable access to information in the digital age.

    PYQ Relevance

    [UPSC 2023] How can Artificial Intelligence (AI) help clinical diagnosis? Do you perceive any threat to privacy of the individual in the use of AI in healthcare?

    Linkage: The PYQ evaluates AI as a decision-support system and examines privacy risks arising from data-driven interventions. The article links by showing AI’s expansion as an intermediary across sectors, raising similar concerns of data control, accountability, and user trust.

  • Frequency Comb

     Why in the News?

    • Frequency combs are highlighted as key modern tools used in atomic clock calibration and other precision measurements.

    What is a Frequency Comb

    • A special type of laser light
    • Its spectrum looks like the teeth of a comb
    • Connects the radio frequency domain (below ~100 GHz) with the optical domain (above ~200 THz)
    • Acts as a precise bridge between microwave and optical frequencies

    Key Characteristics

    • Emits many evenly spaced frequencies, not a single colour
    • Frequency spacing is extremely regular
    • Exhibits very high stability and precision
    • Enables coherent phase connection across wide frequency ranges
    • Compact and highly reliable measurement tool

    Why It Is Important

    • Allows comparison of an unknown light frequency with a stable reference
    • Achieves extraordinary measurement accuracy
    • Revolutionised precision metrology and optical physics

    Applications of Frequency Combs

    • Calibration of atomic clocks
    • Measurement of gravitational redshift effects on light
    • Detection of exoplanets using precise stellar spectroscopy
    • High speed and ultra precise spectroscopy
    • Fundamental physics experiments and precision navigation

    Prelims Takeaway

    • Frequency comb equals laser with evenly spaced frequencies
    • Acts as a frequency ruler for light
    • Essential for atomic clocks, astrophysics, spectroscopy, and precision measurements
    The term ‘Goldilocks Zone’ is often seen in the news in the context of (2015)

    (a) the limits of habitable zone above the surface of the Earth 

    (b) regions inside the Earth where shale gas is available 

    (c) search for the Earth-like planets in outer space 

    (d) search for meteorites containing precious metals

  • Industrial Hemp

    Why in the News?

    • The Chief Minister of Himachal Pradesh has initiated a policy push to legalise and regulate industrial hemp cultivation.

    What is Industrial Hemp

    • Scientific name: Cannabis sativa L.
    • Belongs to the Cannabis genus and Cannabaceae family
    • Herbaceous, dioecious plant
    • Botanically related to marijuana but very different in use and effects
    • THC content less than 0.3%
    • High fiber content and negligible psychoactive effect

    Industrial Hemp vs Marijuana

    • Marijuana: High tetrahydrocannabinol (THC) and psychoactive
    • Industrial hemp: Extremely low THC, used for industrial and commercial purposes

    Key Characteristics

    • Fast growing crop
    • Environment friendly
    • Requires relatively less water and pesticides
    • Suitable for diversified agro industrial value chains

    Applications of Industrial Hemp

    • Fibre and textiles: Cloth, upholstery, ropes
    • Industrial uses: Auto parts, paper, packaging
    • Energy: Biofuel production from stalk
    • Construction: Building materials like hempcrete
    • Seeds and oil: Food products and animal feed. Oil for cosmetics, lotions and personal care products

    Policy Significance

    • Opens avenues for farmer income diversification
    • Boosts green economy and sustainable industries
    • Potential for employment generation in hill states

    Prelims Takeaway

    • Industrial hemp is legally distinct from narcotic cannabis due to very low THC
    • Multi sector utility crop with applications in textiles, construction, energy, food and cosmetics
    According to India’s National Policy on Biofuels, which of the following can be used as raw materials for the production of biofuels? (2020)

    1. Cassava 

    2. Damaged wheat grains 

    3. Groundnut seeds 

    4. Horse gram 

    5. Rotten potatoes 

    6. Sugar beet 

    Select the correct answer using the code given below: 

    (a) 1, 2, 5 and 6 only (b) 1, 3, 4 and 6 only (c) 2, 3, 4 and 5 only (d) 1, 2, 3, 4, 5 and 6

  • Titan

    Why in the News?

    Scientists have re examined data from NASA’s Cassini spacecraft and suggested that Saturn’s largest moon Titan may not have a global subsurface ocean, contrary to earlier studies.

    About Titan

    • Titan is the largest moon of Saturn
      • Second largest moon in the solar system, after Ganymede
      • Discovered in 1655 by Christiaan Huygens
      • Nearly 50 percent wider than Earth’s Moon
      • Only moon with a dense atmosphere
      • Atmosphere dominated by nitrogen with methane
      • Only body besides Earth with stable surface liquids
      • Presence of rivers, lakes, and seas
      • Liquids composed of methane and ethane

    Scientific Significance

    • Earlier models suggested a subsurface ocean
    • New findings indicate uncertainty in the existence or thickness of such an ocean
    • Important for understanding Titan’s internal structure
    • Affects assessment of potential habitability
    • Relevant for future planetary exploration missions

    Cassini Spacecraft

    • Cassini spacecraft was a joint mission of NASA, ESA, and ASI
    • Launched in 1997
    • First spacecraft to orbit Saturn
    • Studied Saturn, its rings, and moons
    • Carried the Huygens probe
    • Huygens landed on Titan in 2005
    • Provided first direct surface data from Titan
    Which of the following pairs is/are correctly matched? (2014)

    Spacecraft — Purpose: 

    I. Cassini-Huygens: Orbiting the Venus and transmitting data to the Earth. 

    II. Messenger: Mapping and investigating Mercury. 

    III. Voyager 1 and 2: Exploring the outer solar system. 

    Select the correct answer using the code given below: 

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

  • K 4 Missile  

    Why in the News?

    India successfully tested the K 4 submarine launched ballistic missile from INS Arighaat in the Bay of Bengal, strengthening its sea based nuclear deterrence.

    About K 4 Missile

    • Also known as Kalam 4 (K 4)
      • Nuclear capable intermediate range submarine launched ballistic missile (SLBM)
      • Designed mainly for deployment on Arihant class submarine
      • Indigenously developed by Defence Research and Development Organisation
    • Each Arihant class submarine can carry four K 4 missiles

    Key Features

    • Length about 12 metres
      • Weight around 17 tonnes
      • Two stage solid fuel propulsion system
      • Maximum range around 3,500 km
      • Payload capacity up to 2 tonnes, including nuclear warhead

    Prelims Pointers

    • K 4 is an SLBM, not a cruise missile
       • Operates from nuclear powered submarines
       • Uses NavIC for navigation support
       • Part of India’s indigenous strategic weapons programme
    Consider the following statements: (2023)

    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? 

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

  • The upskilling gap: why women risk being left behind by AI

    Introduction

    As India moves toward an AI-intensive economic model, access to time for learning and self-development has become a decisive factor in labour market outcomes. Time Use Survey (2019) data reveals that working women in India spend 10 hours less per week on self-development than men, primarily due to disproportionate unpaid care responsibilities. This time deficit risks excluding women from AI-enabled productivity gains, reinforcing occupational segregation and low-wage employment.

    Why in the News?

    The article highlights a first-order structural risk: while AI adoption accelerates, women’s ability to upskill is constrained by time poverty rather than lack of intent or capability. This marks a departure from earlier debates that focused on access to education or labour participation. The scale of the issue is substantial, women work longer total hours per day than men (9.6 vs 8.6 hours) when paid and unpaid work are combined. Yet, women lose out on rest, leisure, and learning time. This creates a persistent disadvantage in an economy increasingly driven by algorithmic efficiency and skill intensity.

    What does India’s Time Use Data reveal about gendered work patterns?

    1. Combined Workload: Working women spend 9.6 hours/day on paid and unpaid work compared to 8.6 hours/day for men.
    2. Unpaid Care Work: Women undertake nearly double the unpaid work of men, especially in childcare, eldercare, cooking, and cleaning.
    3. Age-Specific Burden: The gender gap peaks in the 30-39 age group, coinciding with prime career years and child-rearing responsibilities.

    Why does unpaid work translate into an upskilling disadvantage?

    1. Time Deficit: Women spend 10 fewer hours per week on self-development activities than men.
    2. Opportunity Cost: Reduced time for skill acquisition limits transition to high-value, AI-complementary roles.
    3. Cumulative Effect: Persistent time poverty compounds across years, reinforcing occupational stagnation.

    How does AI intensify existing labour market inequalities for women?

    1. Algorithmic Bias: AI performance metrics penalise career breaks and irregular work histories.
    2. Occupational Traps: Women are overrepresented in low-paid, automation-prone jobs and unpaid family work.
    3. Invisible Labour: Care work remains uncaptured by productivity metrics, excluding women from AI-led recognition systems.

    Why are women more vulnerable to exclusion from AI-led productivity gains?

    1. Skill Transition Barriers: AI rewards continuous learning, which women lack time to pursue.
    2. Sectoral Segregation: Women’s concentration in informal and care-intensive sectors limits AI exposure.
    3. Labour Force Exit: Over 40% of women outside the labour force cite household responsibilities as the primary reason.

    Why is this a macroeconomic and governance challenge, not just a gender issue?

    1. Productivity Loss: Underutilisation of women’s human capital reduces aggregate growth.
    2. Demographic Dividend Risk: Exclusion of women weakens India’s long-term workforce potential.
    3. Inclusive Growth Failure: AI-led growth without gender equity risks widening income and skill inequalities.

    Policy Implications 

    1. Workplace Redesign
      1. Time Recognition: Integrates unpaid care work into productivity assessments.
      2. Flexibility: Supports hybrid work models aligned with care responsibilities.
    2. Infrastructure Support
      1. Care Services: Expands childcare, eldercare, and safe public transport.
      2. Utilities Access: Reduces time spent on water, fuel, and energy collection.
    3. Skill Policy Reorientation
      1. Time-Saving Learning Models: Encourages modular, flexible, and remote upskilling formats.
      2. Targeted AI Skilling: Prioritises women-centric AI and digital training initiatives.
    4. Budgetary Prioritisation
      1. Gender Budgeting: Aligns public expenditure with time-saving social infrastructure.
      2. Outcome Metrics: Tracks women’s skill mobility and wage progression.

    Conclusion:

    An AI-driven growth strategy that overlooks women’s time poverty and unpaid care work risks deepening structural inequalities and weakening India’s human capital base. Integrating care responsibilities into economic planning, skill policy, and public expenditure is essential to ensure that technological progress translates into inclusive, equitable, and sustainable development.

    PYQ Relevance

    [UPSC 2023] Distinguish between ‘care economy’ and ‘monetized economy’. How can care economy be brought into monetized economy through women empowerment?

    Linkage: The question addresses structural issues of inclusive growth, gender inequality, and human capital formation, which are recurring themes in GS-III (Economy) and GS-I (Society).

  • NASA Loses Contact with MAVEN  

    Why in the News?

    The National Aeronautics and Space Administration has lost contact with its Mars orbiter Mars Atmosphere and Volatile Evolution (MAVEN), which has been studying the Red Planet’s atmosphere for over a decade.

    About MAVEN Mission

    • Launch: by NASA
    • Launch site: Cape Canaveral, Florida
    • Mars orbit insertion: September 2014
    • Mission type: Mars orbiter
    • Primary objective: Study the loss of Mars atmosphere to space

    Scientific Objectives

    • Measure the thin upper atmosphere of Mars
    • Study the ionosphere, which consists of charged particles
    • Observe interaction of sunlight and solar wind with the Martian atmosphere
    • Explain how Mars changed from a warm and wet planet to a cold and dry one
    [2016] Consider the following statements: The Mangalyaan launched by ISRO: 

    1. is also called the Mars Orbiter Mission. 

    2. made India the second country to have a spacecraft orbit the Mars after USA. 

    3. made India the only country to be successful in making its spacecraft orbit the Mars in its very first attempt. 

    Which of the statements given above is/are correct? 

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

  • Anjadip Inducted into Indian Navy  

    Why in the News?

    The Indian Navy received Anjadip, the third of eight Anti Submarine Warfare Shallow Water Craft (ASW SWC), on December 22, 2025 at Chennai.

    About Anjadip and ASW SWC Project

    • Type: Anti Submarine Warfare Shallow Water Craft
    • Role: Anti submarine warfare, coastal surveillance, mine laying
    • Length: Around 77 metres
    • Propulsion: Waterjets
    • Distinction: Largest Indian naval warships propelled by waterjets

    Builder and Collaboration

    • Designed and built by Garden Reach Shipbuilders and Engineers
    • Project executed under Public Private Partnership
    • Private partner: Larsen and Toubro Shipyard, Kattupalli
    • Classification: Built as per Indian Register of Shipping rules
    [2016] Which one of the following is the best description of ‘INS Astradharini’, that was in the news recently? 

    (a) Amphibious warfare ship 

    (b) Nuclear-powered submarine 

    (c) Torpedo launch and recovery vessel 

    (d) Nuclear-powered aircraft carrier 

  • Dark Eagle Hypersonic Missile System

    Why in the News?

    The United States Army and United States Navy have successfully completed integrated testing of the Dark Eagle Long Range Hypersonic Weapon (LRHW) system.

    About Dark Eagle Hypersonic Missile System

    • Hypersonic missile system developed for the United States Army
      • Non nuclear, ground-launched weapon system
      • Designed for strategic attack missions
      • Developed by Lockheed Martin and Northrop Grumman
      • Intended to penetrate Anti Access Area Denial (A2 AD) environments

    Strategic Role

    • Suppresses long range enemy fires
      • Penetrates advanced missile defense systems
      • Delivers rapid, precise, and time critical strikes
      • Enhances conventional deterrence without nuclear escalation

    Prelims Pointers

    • Country: United States
      • Type: Ground launched hypersonic weapon
      • Nuclear status: Non nuclear
      • Speed: Up to Mach 17
      • Key component: Common Hypersonic Glide Body
      • Objective: Penetration of A2 AD defenses
    [2022] Which one of the following statements best reflects the idea behind the “Fractional Orbital Bombardment System” often talked about in media?

     (a) A hypersonic missile is launched into space to counter the asteroid approaching the Earth and explode it in space. 

    (b) A spacecraft lands on another planet after making several orbital motions. 

    (c) A missile is put into a stable orbit around the Earth and deorbits over a target on the Earth. 

    (d) A spacecraft moves along a comet with the same speed and places a probe on its surface.