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Subject: Science and Technology

  • How can V2G Technology help India’s Power Sector?

    Why in the News?

    Kerala State Electricity Board (KSEB) has partnered with IIT Bombay to launch a pilot project on Vehicle-to-Grid (V2G) technology, integrating electric vehicles into the power grid.

    About V2G Technology:

    • V2G enables Electric Vehicles (EVs) to send power back to the grid when not in use, turning EV batteries into decentralized energy storage devices.
    • It involves two key functions:
    1. Grid-to-Vehicle (G2V): Power is transferred from the grid to charge the EV.
    2. Vehicle-to-Grid (V2G): Power is sent from the EV back to the grid, making the vehicle a distributed energy source.
    • Smart charging strategies optimize charging based on grid demand and renewable energy availability, enhancing grid stability and enabling renewable energy integration.

    About the KSEB-IIT Bombay V2G Pilot Project:

    • This pilot aims to assess EVs’ role in supporting the power grid, especially during peak demand periods when solar energy is unavailable.
    • Kerala’s growth in EV adoption and rooftop solar installations has raised concerns about increased electricity demand, particularly in the evenings.
    • The project will explore the feasibility of using EVs to reduce grid strain and optimize the use of renewable energy.

    Applications of V2G:

    • Grid Support: EVs can supply power back to the grid during high-demand periods, improving grid stability.
    • Solar Energy Integration: V2G encourages charging during the day when solar power is abundant, and storing excess energy to supply the grid at night.
    • Emergency Power Source: EVs can act as backup power during crises or natural disasters, providing electricity to communities.
    [UPSC 2024] Which one of the following is the exhaust pipe emission from Fuel Cell Electric Vehicles powered by hydrogen?

    (a) Hydrogen peroxide (b) Hydronium (c) Oxygen (d) Water vapour *

     

  • JSWT finds Strongest Evidence of Life

    Why in the News?

    Scientists using the James Webb Space Telescope (JWST) have found signs of possible life on exoplanet K2-18 b by detecting gases usually produced by Earth’s biological processes.

    jswt

    Key findings of the Recent Study:

    • Scientists detected significant biosignatures in the atmosphere of K2-18 b, including dimethyl sulphide (DMS) and dimethyl disulfide (DMDS).
    • These gases, on Earth, are primarily produced by marine phytoplankton.
    • High concentrations of these gases suggest the possibility of microbial life, particularly in the planet’s oceans.
    • However, researchers caution that this is not definitive proof of life but a potential biosignature indicating biological processes.
    • Further studies and observations are needed to confirm whether these gases are biologically produced or the result of other processes.

    About James Webb Space Telescope (JWST):

    • JWST is a joint venture between NASA, the European Space Agency (ESA) and the Canadian Space Agency (CSA) launched in December 2021.
    • It is an orbiting infrared observatory that will complement and extend the discoveries of the Hubble Space Telescope, with longer wavelength coverage and greatly improved sensitivity.
    • Webb was formerly known as the “Next Generation Space Telescope” (NGST), and it was renamed in 2002 after a former NASA administrator, James Webb.
    • It isa large infrared telescope with an approximately 6.5-meter primary mirror.
    • JWST is positioned at the Earth-Sun L2 Lagrange point, 5 million km away.
    • It consists of a mirror, spanning 6.5 meters in diameter compared to Hubble’s 2.4 meters, and its specialised instruments optimised for infrared observations.
    • Key Objectives:
      • JWST observes deeper into the universe than Hubble.
      • Observes celestial objects from earlier epochs.
      • Enables the detection of light from the universe’s earliest stars, dating back over 13.5 billion years.
    [UPSC 2020] The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilometres long, with lasers shining between the craft.” The experiment in question refers to:

    Options: (a) Voyager-2 (b) New Horizons (c) LISA Pathfinder (d) Evolved LISA*

     

  • India’s first-ever Seed Germination Database

    Why in the News?

    On April 16, 2025, the Ecological Restoration Alliance-India (ERA-I) has released a first-of-its-kind seed germination database aimed at enhancing the success of growing native plants for ecological restoration.

    About the Seed Germination Database:

    • It was launched by the Ecological Restoration Alliance-India (ERA-I).  ERA was formed in July 2021, as an informal collective between practitioners, ecologists and individuals.
    • ERA-I collaborated with organizations like Auroville Botanical Gardens, NCF, and Wildlife Trust of India.
    • It features over 1,000 germination techniques for 465 native plant species found across India.
    • It aims to help restoration practitioners, nursery managers, and native plant enthusiasts improve success rates in growing plants for ecological restoration.
    • It is a free-access database and offers valuable information on germinating native plants crucial for restoration projects.
    • Native Plants Included:
      • The database features a diverse array of native plant species. These species are key to restoring balance in degraded ecosystems.
      • They are – Aegle marmelos (Wood apple), Bauhinia racemosa (Beedi leaf tree), Ficus benghalensis (Banyan), Withania somnifera (Ashwagandha), Ziziphus mauritiana (Indian jujube), Knema attenuata (Wild nutmeg), Lawsonia inermis (Henna), Madhuca longifolia (Mahua), Vachellia nilotica (Babool).

    Significance:

    • Native plants are essential for creating climate-resilient ecosystems.
    • Such database plays a vital role in ecological restoration.
    • It provides 1,000+ techniques for growing native plants, enhancing the success of restoration projects.
    • The database supports India’s Bonn Challenge commitment to restore 26 million hectares of degraded land by 2030.
    [UPSC 2016] In the context of food and nutritional security of India, enhancing the ‘Seed Replacement Rates’ of various crops helps in achieving the food production targets of the future. But what is/are the constraint/constraints in its wider/greater implementation?

    1. There is no National Seeds Policy in place.

    2. There is no participation of private sector seed companies in the supply of quality seeds of vegetables and planting materials of horticultural crops.

    3. There is a demand-supply gap regarding quality seeds in case of low value and high volume crops. Select the correct answer using the code given below:

    Options: (a) 1 and 2 only (b) 3 only * (c) 2 and 3 only (d) None of the above

     

  • What is Tensor Processing Unit (TPU)?

    Why in the News?

    Recently Google introduced its seventh-generation TPU (Tensor Processing Unit), named Ironwood.

    About Ironwood

    • Ironwood is Google’s seventh-generation Tensor Processing Unit (TPU), designed to accelerate AI model training and inference with improved performance and efficiency.
    • It builds on previous TPUs, enhancing speed and efficiency for AI workloads.
    • It has been optimized for complex AI tasks, especially those requiring high-speed data processing for neural networks and deep learning models.
    • Initially used internally, Ironwood is now available via Google Cloud Platform, allowing businesses to harness its power without investing in dedicated hardware.

    What is a TPU?

    • A TPU is a specialized processor developed by Google to accelerate machine learning tasks, particularly those involving TensorFlow.
    • TPUs are optimized for tensor operations, crucial for training deep learning models, enabling faster data processing and high efficiency.

    How is TPU Different from GPU and CPU?

    CPU GPU TPU
    What is it? Central Processing Unit – General-purpose processor for various computing tasks. Graphics Processing Unit – Specialized for parallel processing, initially for graphics rendering. Tensor Processing Unit – Specialized processor designed by Google for accelerating machine learning tasks, particularly for AI and deep learning.
    Specialization General-purpose tasks (sequential processing) Parallel processing (graphics, machine learning) Specialized for AI tasks (tensor computations)
    Performance Slower for AI tasks due to sequential processing Faster than CPU for parallel tasks Fastest for AI tasks like matrix multiplication
    Efficiency Versatile but less efficient for AI operations Energy-efficient for parallel tasks Highly energy-efficient for machine learning
    Best for Running applications, managing systems Graphics rendering, machine learning Deep learning, neural network training

     

    [UPSC 2020] With the present state of development, Artificial Intelligence can effectively do which of the following?

    (1) Bring down electricity consumption in industrial units (2) Create meaningful short stories and songs (3) Disease diagnosis (4) Text-to-Speech Conversion (5) Wireless transmission of electrical energy

    Select the correct answer using the code given below:

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

     

  • China halts export of Rare Earth Magnets

    Why in the News?

    China has suspended exports of a wide range of critical minerals and magnets after US’s tariff embargo.

    What Are Rare Earth Elements (REEs) and RE Magnets?

    • REEs are a group of 17 elements in the periodic table, including Lanthanum (La), Neodymium (Nd), Europium (Eu), and Ytterbium (Yb).
    • Though not rare, they are found in low concentrations, making extraction challenging and costly.
    • Classification:
      • Light REEs (LREEs): Elements 57-63, such as La, Ce, Nd, and Sm.
      • Heavy REEs (HREEs): Elements 64-71, like Gd, Tb, Dy, and Er.
      • Scandium and Yttrium: Classified with HREEs due to similar chemical properties.
    • Rare Earth Magnets are powerful permanent magnets made from elements like Neodymium (Nd), Samarium (Sm), and Dysprosium (Dy).
    • They are far stronger and more efficient than traditional magnets, crucial for high-tech electronic applications.

    Global Supply Chain of REEs:

    • REEs are abundant but difficult to extract economically.
    • China alone dominates, producing 70% of the global supply and controlling 80% of the refining capacity. REEs are primarily mined from China’s Bayan Obo mine.
    • Australia, USA, Brazil, and Russia also contribute, though less significantly.
    • Refining also is largely controlled by China, though other nations are working to build their own refining capabilities to reduce dependency.
    [UPSC 2022] Consider the following statements:

    1. Monazite is a source of rare earths. 2. Monazite contains thorium. 3. Monazite occurs naturally in the entire Indian coastal sands in India. 4. In India, Government bodies only can process or export monazite.

    Which of the statements given above are correct?

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

     

  • KATRIN Experiment

    Why in the News?

    The KATRIN (Karlsruhe Tritium Neutrino Experiment) has made a groundbreaking achievement by measuring neutrino mass with a new precision.

    About the KATRIN Experiment:

    • The KATRIN is located at the Karlsruhe Institute of Technology (KIT), specifically on its Campus North site in Karlsruhe, Germany.
    • It is aimed at measuring the mass of the electron antineutrino with sub-eV precision.
    • It has measured the mass of neutrinos by studying the beta decay of tritium, a radioactive form of hydrogen.
    • The mass was inferred by analyzing the energy of the emitted electrons.
    • Technological Setup:
      • A 70-meter-long beamline with a powerful tritium source.
      • A 10-meter-wide spectrometer to measure the energy of emitted electrons with high precision.
    • Key Findings:
      • KATRIN has set a new upper limit for neutrino mass at less than 0.45 eV/c² (8 × 10⁻³⁷ kg), nearly twice as precise as previous measurements from 2022.
      • Data Collection was based on five campaigns from 2019-2021, totalling 250 days of data.

    Neutrinos and Their Properties

    • Neutrinos are extremely light subatomic particles that rarely interact with matter, making them difficult to detect.
    • They are found in cosmic rays and solar radiation.
    • Properties:
      • Mass: Their small mass influences cosmic structure formation, such as galaxies and clusters.
      • Weak Interaction: They interact via the weak nuclear force, allowing them to pass through vast amounts of matter.
    • They are essential in particle reactions and play a key role in galaxy formation and the study of dark matter.

     

    [UPSC 2010] India-based Neutrino Observatory is included by the planning commission as a mega-science project under the 11th Five-year plan. In this context, consider the following statements:

    1.Neutrinos are chargeless elementary particles that travel close to the speed of light.

    2.Neutrinos are created in nuclear reactions of beta decay.

    3.Neutrinos have a negligible, but non-zero mass.

    4.Trillions of Neutrinos pass through the human body every second.

    Which of the statements given above are correct?

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

     

  • Novel Silicon Photonics Breakthrough

    Why in the News?

    In a major breakthrough, Indian researchers have developed a new type of laser that can be placed directly onto silicon chips, a key component of modern computers.

    What is Silicon Photonics?

    • Silicon photonics is a technology that uses light (photons) instead of electrical signals to transmit data inside computer systems.
    • Light can carry more data at higher speeds with less energy than electricity, making it a promising technology for future computing and data transfer.
    • Traditional silicon chips struggle to produce light, requiring external lasers, which were inefficient and costly.
    • Silicon photonics can significantly enhance data transfer speed and efficiency, benefiting industries like data centers and telecommunications.

    About the Miniaturized Laser Technology

    • Indian researchers have successfully integrated a laser directly onto a silicon chip, eliminating the need for separate lasers.
    • The laser is made using gallium arsenide (where 20% of gallium atoms had been replaced with indium to achieve optimal light emission), which helps silicon emit light, a crucial step since silicon alone cannot produce light efficiently.
    • It uses minimal power, ideal for high-performance, energy-efficient computers.
    • Direct integration reduces costs, making the technology scalable for mass production.
    • This innovation boosts computing power, particularly in data centers where fast data transfer is critical.
    • Efforts are underway to enhance its durability, especially at higher temperatures, for broader industrial use.
    [UPSC 2008] Which one of the following laser types is used in a laser printer?

    (a) Dye laser (b) Gas laser (c) Semiconductor laser (d) Excimer laser

     

  • Real Time LAMP Assay for Early Diagnosis of TB

    Why in the News?

    Researchers from Thiruvananthapuram have developed a cost-effective Real-Time LAMP (rt-LAMP) Assay for early Tuberculosis (TB) diagnosis.

    About the rt-LAMP Assay

    • The rt-LAMP assay (real-time Loop-mediated Isothermal Amplification) is a molecular diagnostic test designed to detect TB DNA with high precision.
    • It can detect TB DNA at concentrations as low as 10 copy numbers per microlitre, ensuring early detection even with low bacterial loads.
    • Developed by SCTIMST, Thiruvananthapuram, the rt-LAMP assay uses Syto 16, a fluorescent dye, to monitor DNA amplification in real time, addressing the limitations of traditional LAMP tests.
    • Working Principle:
      • It uses six primers for DNA amplification (compared to two in RT-PCR), enhancing amplification speed.
      • It operates at a single temperature, unlike RT-PCR, making it simpler and more cost-effective.
      • It monitors the amplification process continuously, providing faster results.

    Advantages Offered:

    • High Sensitivity and Specificity: Ensures accurate detection of TB DNA due to the use of six primers.
    • Cost-Effective: Uses affordable fluorescent dyes and primers, reducing diagnostic costs.
    • Speed: Produces results in just 10-20 minutes, faster than traditional tests.
    • Ease of Use: Compatible with existing RT-PCR machines, reducing the need for new infrastructure.
    • High Throughput: Can process 96-384 tests in one run, making it ideal for high-volume settings.
    [UPSC 2007] Which of the following types is used by computed tomography employed for visualization of the internal structure of the human body?

    (a) X-rays (b) Sound Waves (c) Magnetic Resonance (d) Radioisotopes

     

  • The conservation argument for resurrecting dire wolf is not credible

    Why in the news?

    Colossal Biosciences is an American company that combines genetics and conservation in a unique way by bringing back species that have been extinct for thousands of years.

    What is the primary goal of Colossal Biosciences’ de-extinction project?

    Colossal Biosciences is a biotechnology company specializing in de-extinction projects, aiming to revive extinct species through advanced genetic engineering.

    • Woolly Mammoth De-Extinction: Colossal is working to resurrect the woolly mammoth by integrating mammoth genes into the Asian elephant genome using CRISPR technology. The goal is to create a cold-resistant elephant with traits characteristic of the woolly mammoth, such as a thick layer of fat and shaggy hair, to inhabit Arctic tundra regions and potentially combat climate change.
    • Dire Wolf Revival: In a groundbreaking achievement, Colossal announced the birth of three pups—Romulus, Remus, and Khaleesi—genetically engineered to resemble the extinct dire wolf. Using DNA from ancient dire wolf remains, scientists edited the genes of modern gray wolves, resulting in animals that exhibit traits such as larger size and distinctive fur color.

    Why do critics question the credibility of reviving extinct species for conservation purposes?

    • Lack of Scientific Proof: The actual success of reviving extinct species like the woolly mammoth has not yet been proven through rigorous peer review or established results.
    • Limited Genetic Editing: The extent of genetic editing in revived species often involves only a small number of genes, leading to incomplete or flawed replicas of the original species. Eg: In the case of the dire wolf, only 20 genes were edited, resulting in what critics describe as just a “strange-looking gray wolf” rather than a true de-extinct species.
    • Ethical Concerns: There are ethical debates over the potential consequences of creating species that may not thrive in the modern environment or might cause unforeseen ecological imbalances. Eg: The introduction of revived species like the woolly mammoth could disrupt current ecosystems in ways that may not be beneficial.

    How can bringing back the woolly mammoth help stop global warming?

    • Restoring Grasslands: The woolly mammoth can help restore Arctic grasslands by grazing on shrubs and plants, which would create open grasslands where permafrost can remain intact. Eg: By grazing, mammoths would prevent the growth of shrubs that trap heat, promoting the return of grasslands that are cooler and better at reflecting sunlight.
    • Slowing Permafrost Melt: Grasslands absorb less heat than shrub forests, helping to keep the permafrost cool. The return of woolly mammoths could help prevent the thawing of permafrost, which releases methane, a potent greenhouse gas. Eg: Mammoth grazing can keep the ground cooler and slow the thawing of permafrost, thus reducing the release of methane into the atmosphere.
    • Preventing Methane Emissions: As the permafrost melts, it releases large amounts of methane into the atmosphere. Woolly mammoths could help mitigate this by maintaining ecosystems that slow down the permafrost’s thaw. Eg: With mammoths grazing, the tundra could remain cooler and less prone to releasing methane.
    • Enhancing Carbon Sequestration: Grasslands are more effective at absorbing carbon than shrubbery or forested areas. By converting tundra back into grasslands, woolly mammoths could enhance carbon sequestration and help store more carbon in the soil. Eg: Woolly mammoths could help re-establish healthy grasslands, which would act as carbon sinks, absorbing more CO2 from the atmosphere.

    What is India’s situation in advanced genetic engineering?

    • Advancements in Agricultural Biotechnology: India has developed a structured regulatory framework for genetically modified organisms (GMOs) under the Environment (Protection) Act, of 1986. Eg: Recently, India initiated trials of CRISPR/Cas9-modified rice varieties in test fields, reflecting a surge in scientific research and innovation in plant genome editing.
    • Pioneering Genomic Research and Precision Medicine: India’s Genome India Project aims to sequence at least 10,000 Indian genomes to develop predictive diagnostic indicators for various diseases. Eg: Institutions like the Institute of Genomics and Integrative Biology (IGIB) have been instrumental in understanding genetic epidemiology, including the development of the FELUDA COVID-19 test based on CRISPR technology.

    Way forward: 

    • Strengthen Ethical and Regulatory Frameworks: India should establish robust regulations and ethical guidelines for genetic engineering, particularly for gene-editing technologies like CRISPR, to ensure safety and sustainability in areas such as agriculture and medicine.
    • Promote Collaborative Research and Innovation: Encouraging partnerships between academic institutions, the private sector, and the government will help accelerate research and application of advanced genetic technologies, positioning India as a global leader in biotechnology innovation.

    Mains PYQ: 

    [UPSC 2024] What strategies have been developed to prevent such a catastrophe [mass extinction of life]?

    Linkage: The article says we should focus more on saving the species that are alive today, rather than trying to bring back extinct ones. The debate about de-extinction raises the question of whether it’s better to spend resources on protecting current species instead.

  • Three Gorges Antarctic Eye Telescope

    Why in the news?

    China has unveiled the Three Gorges Antarctic Eye telescope in Antarctica.

    About the Three Gorges Antarctic Eye Telescope

    • The Three Gorges Antarctic Eye is a 3.2m wide radio/millimetre-wave telescope located at China’s Zhongshan Station in Antarctica.
    • It was developed by China Three Gorges University (CTGU) and Shanghai Normal University (SHNU).
    • This telescope can detect radio waves and millimeter waves, types of invisible light, allowing scientists to study phenomena like neutral hydrogen and ammonia molecules, essential for understanding star formation and gas movement in space.
    • Unlike most telescopes, it works with both radio and millimeter waves, providing a more comprehensive view of space.
    • It is built in one of the harshest environments on Earth, with operating temperatures below -60°C and strong winds, making construction particularly challenging.
    [UPSC 2015] The term ‘IndARC’, sometimes seen in the news, is the name of:

    (a) an indigenously developed radar system inducted into Indian Defence

    (b) India’s satellite to provide services to the countries of Indian Ocean Rim

    (c) a scientific establishment set up by India in Antarctic region

    (d) India’s underwater observatory to scientifically study the Arctic region