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GS Paper: GS3

  • Secondary Pollutants constitute up to third of PM2.5 Pollution

    Why in the News?

    A recent study by the Centre for Research on Energy and Clean Air (CREA) highlights that secondary pollutants, particularly ammonium sulphate, are responsible for nearly one-third of India’s PM2.5 pollution.

    What are Primary Air Pollutants?

    • Definition: Primary air pollutants are directly released into the atmosphere from specific sources like vehicles, coal plants, industries, and biomass burning.
    • Natural and Man-made Origins: They arise from both natural events, such as dust storms, and human activities like fuel combustion.
    • Key Examples:
      • Carbon monoxide (CO) – from incomplete fuel combustion in vehicles and stoves.
      • Sulphur dioxide (SO₂) – from burning sulphur-rich coal, especially in power plants.
      • Nitrogen oxides (NOₓ) – from high-temperature fuel combustion in vehicles and factories.
      • Particulate Matter (PM) – includes soot, dust, smoke, and other visible particles.
      • Volatile Organic Compounds (VOCs) – released from fuel fumes and industrial solvents.
    • Impact: These pollutants are immediately harmful to health and easier to trace to their sources.

    About Secondary Air Pollutants:

    • Definition: Secondary pollutants form in the atmosphere through chemical reactions involving primary pollutants and environmental agents like sunlight and water vapour.
    • Formation Factors: Their creation depends on weather, sunlight, and existing pollutants, making them more complex.
    • Key Examples:
      • Ammonium sulphate and nitrate – from SO₂ and NH₃ reacting in the air.
      • Ground-level ozone (O₃) – formed when NOₓ and VOCs react under sunlight.
      • Acid rain components – such as sulfuric and nitric acids.
      • Photochemical smog – a mix of toxic secondary pollutants in urban air.
    • Impact: They contribute heavily to PM2.5 pollution and have long-lasting, widespread effects.

    Highlights from CREA’s Study:

    • Ammonium Sulphate Share: This secondary pollutant accounts for 34% of India’s PM2.5, averaging 11.9 ÎŒg/mÂł nationwide.
    • Source Link: It forms from SO₂ (mainly from coal plants) reacting with ammonia from fertilisers and waste.
    • FGD Compliance: Only 8% of India’s coal plants have installed flue gas desulphurisation (FGD) units, despite regulations.
    • High Exposure Zones: Within 10 km of coal plants, ammonium sulphate levels are 2.5 times higher than in distant areas.
    • NCAP City Impact: In 130 cities, it contributes 20–43% of PM2.5; in 114 cities, the share exceeds 30%.
    • Other Contributors: Ammonium nitrate and similar secondary compounds form up to 50% of PM2.5 in many places.
    • Policy Suggestions: The study urges rapid FGD rollout, fertiliser reform, and strict pollution control enforcement.
    [UPSC 2013] Photochemical smog is a resultant of the reaction among-

    Options: (a) NO 2 , O 3 and peroxyacetyl nitrate in the presence of sunlight * (b) CO 2 , O 2 , and peroxyacetyl nitrate in the presence of sunlight (c) CO, CO 2 , and NO 2 at low temperature (d) high concentration of NO 2 , O 3 and CO in the evening

     

  • Botrytis Fungus and Wine-Making

    Why in the News?

    Scientists have found that Botrytis cinerea, the fungus used in high-end sweet wines, cannot be cloned because none of its nuclei carry a full set of chromosomes, a rare genetic trait among fungi.

    About Botrytis Fungus:

    • Overview: Botrytis cinerea, also called noble rot, is a fungus that infects ripe grapes and causes them to shrivel while concentrating sugar and flavour.
    • Fungal Classification: It belongs to the ascomycetes group and produces spores in sac-like structures known as asci, each containing eight ascospores.
    • Role in Winemaking: Under controlled vineyard conditions, Botrytis infection is desirable, as it enhances the sweetness and aroma of wine.
    • How is Wine Made Using It?
      • Effect on Grapes: The fungus dehydrates the grapes, which increases the sugar content and concentrates flavours naturally.
      • Harvesting Method: Grapes affected by Botrytis are hand-harvested, making the process labour-intensive and expensive.
      • Wine Varieties Produced: It is used to produce premium dessert wines such as Sauternes (France), Tokaji AszĂș (Hungary), and Trockenbeerenauslese (Germany), known for their complex flavours and high value.

    Significance of Recent Findings:

    • Cloning Discovery: A recent study in Science found that Botrytis cannot be cloned, as no single nucleus contains a full set of chromosomes.
    • Unique Genome Structure: The chromosomes are distributed across multiple nuclei, which is unprecedented in any known fungus, animal, or plant.
    • Scientific Impact: This challenges conventional genetics and may lead to new insights in genome organisation and fungal evolution.
    • Dual Importance: Botrytis is now seen not only as a key player in winemaking but also as a genetic curiosity in modern science.
    [UPSC 2009] In the context of alternative sources of energy, ethanol as a viable bio-fuel can be obtained from:

    (a) Potato (b) Rice (c) Sugarcane* (d) Wheat

     

  • National Statistics Day

    Why in the News?

    June 29 is observed annually as National Statistics Day in India to commemorate the birth anniversary of Prasanta Chandra Mahalanobis, hailed as the Father of Indian Statistics.

    About National Statistics Day:

    • Purpose: National Statistics Day is observed on June 29 each year to commemorate the birth anniversary of P.C. Mahalanobis and highlight the value of statistics in national development.
    • First Observance: It was first celebrated in 2007, following a government resolution to raise awareness about the role of statistics in socio-economic planning.
    • Objectives: It aims to emphasise the use of statistical tools in governance, policy-making, and development planning.
    • Organizers: Events are led by the Ministry of Statistics and Programme Implementation (MoSPI) and the Indian Statistical Institute (ISI).
    • Annual Themes: Each year features a dedicated theme focusing on a statistical challenge or development goal.
    • Events and Outreach: Celebrations include seminars, exhibitions, competitions, and lectures across institutions.
    • Commemorative Status: Though not a public holiday, it is a nationally recognized observance.

    Who was P.C. Mahalanobis?

    • Background: He was born on June 29, 1893, in Kolkata, into a Brahmo Samaj family.
    • Education: He studied at Presidency College and later at King’s College, Cambridge.
    • Legacy Title: He is hailed as the Father of Modern Statistics in India and was known as “The Professor”.
    • Institution Builder: He founded the Indian Statistical Institute (ISI) and helped set up India’s Planning Commission.
    • His Major Contributions:
      • National Sample Survey (NSS): Launched in 1950, it enabled the systematic collection of household data for policymaking.
      • Mahalanobis Distance: Introduced in 1936, it remains a widely used statistical tool for identifying outliers in data.
      • Applied Statistics: He applied statistical methods to flood control in Bengal and Odisha, offering cost-effective solutions.
      • Planning Vision: Mahalanobis played a key role in drafting the Second Five-Year Plan, focusing on industrialisation and state-led growth.
      • Academic Promotion: He started the journal Sankhya, modeled on Biometrika, to foster statistical research in India.
      • Infrastructure Vision: His early proposal led to the Hirakud Dam project, completed in 1957.
      • Balanced Approach: Though viewed as pro-Soviet during the Cold War, he was admired for his intellectual integrity.
    [UPSC 2016] A recent movie titled The Man Who Knew Infinity is based on the biography of:

    (a) S. Ramanujan (b) S. Chandhrashekhar (c) S. N. Bose (d) C. V. Raman

     

  • Species in news: Asiatic Wild Dog (Dhole)

    Why in the News?

    The elusive dhole (Cuon alpinus), also known as the Asiatic wild dog, has been rediscovered in Assam’s Kaziranga-Karbi Anglong Landscape (KKAL) after being thought locally extinct.

    About Dhole:

    • Overview: The dhole (Cuon alpinus), also known as the Asiatic wild dog, is a carnivorous mammal from the Canidae family.
    • Habitat: Historically, dholes inhabited southern Russia, Central Asia, South Asia, and Southeast Asia but are now limited to South and Southeast Asia, including India, Nepal, Bhutan, Bangladesh, and China.
    • Clusters in India: In India, dholes are found mainly in the Western and Eastern Ghats, the Central Indian Landscape, and the Northeast.
    • Key States: According to a 2020 study, Karnataka, Maharashtra, and Madhya Pradesh lead in dhole conservation efforts.
    • Social Behaviour: Dholes live in packs of up to 30 but may also hunt solo or in pairs depending on prey availability.
    • Ecological Role: As predators, dholes help regulate prey populations and maintain ecosystem balance.
    • Conservation Status:
      • IUCN Red List: Endangered
      • CITES: Appendix II (not necessarily threatened with extinction but may become so if trade is not closely controlled).
      • Wildlife Protection Act, 1972: Schedule II (considered important for conservation and are granted a high degree of protection).

    Back2Basics: Kaziranga-Karbi Anglong Landscape (KKAL)

    • Geographic Spread: KKAL is located south of the Brahmaputra River in Assam, comprising Kaziranga National Park (KNP) and the Karbi Anglong Hills.
    • Ecological Importance: KNP is a UNESCO World Heritage Site and part of the Indo-Burma Biodiversity Hotspot, known for rich, unmodified ecosystems.
    • Wildlife Corridor: KKAL facilitates seasonal migration during Brahmaputra floods, supporting species movement and survival.
    • Flagship Species: The landscape hosts the world’s largest population of Indian one-horned rhinoceroses, as well as Bengal tigers, elephants, swamp deer, and wild buffalo.
    • B2B Corridor: KKAL forms a vital link in the proposed Bhutan-to-Burma (B2B) Connected Landscape, a 1,400 km biodiversity corridor across northeast India.

     

  • [pib] Researchers validate Optical Properties of Teak Leaf Extracts

    Why in the News?

    In a breakthrough, scientists at the Raman Research Institute (RRI) have found that teak leaf extract (Tectona grandis) could offer a natural, sustainable solution for laser protection.

    About Optical Properties of Teak Leaf:

    • Natural Composition: Teak leaves (Tectona grandis) contain natural compounds that can interact with strong laser light.
    • Laser Blocking Ability: These compounds can block harmful laser rays while allowing normal light to pass, making them suitable for selective light filtering.
    • Nonlinear Optics: This unique behaviour is called a nonlinear optical property, where a material responds differently to high-intensity light.
    • Linear vs Nonlinear: In linear optics, the material’s response is directly proportional to the light’s intensity. In nonlinear optics, the response becomes non-proportional, especially under laser exposure.

    Back2Basics: Teak as Timber in India

    • Teak (Tectona grandis) is a large deciduous hardwood tree native to India and Southeast Asia, mainly found in tropical dry and moist deciduous forests.
    • It is highly valued for its durable, strong, and water- and pest-resistant wood, making it the “King of Timbers”.
    • India manages 35% of the world’s planted teak forests, with major natural habitats in Madhya Pradesh, Maharashtra, Karnataka, Tamil Nadu, and Kerala.
    • Teak is listed as Endangered on the IUCN Red List but is not under CITES; private plantations are crucial for meeting demand due to restrictions on commercial felling in government forests.
    • Green felling is prohibited in government forests under the Forest Conservation Act, 1980, and National Forest Policy, 1988, with timber supply to be met mainly from dead/diseased trees or private plantations.

    Recent Breakthrough:

    • New Discovery: Scientists discovered that teak leaf extract can function as a natural laser shield.
    • Protection Potential: The extract can block high-intensity laser beams, offering protection to human eyes and sensitive optical devices.
    • First of Its Kind: This marks the first known instance of a natural material exhibiting such laser-blocking properties.

    Significance for Humans:

    • Practical Applications: It can be used in laser safety goggles, optical sensors, and other light-sensitive technologies.
    • Safe Alternative: It offers a non-toxic, eco-friendly substitute to chemical-based laser protection materials.
    • Sustainability Impact: The use of plant-based materials supports cost reduction and promotes sustainable innovation in science and optics.
    [UPSC 2015] In India, in which one of the following types of forests is teak a dominant tree species?

    Options: (a) Tropical moist deciduous forest* (b) Tropical rain forest (c) Tropical thorn scrub forest (d) Temperate Forest with grasslands

     

  • Type 2 diabetes rising among young people, posing lifetime risks: Lancet

    Why in the News?

    A new series by The Lancet highlights a major shift in global health. Type 2 diabetes, which earlier affected mostly older people, is now increasing quickly among those under 40. Around 260 million young adults worldwide already have the disease.

    What distinguishes early-onset type 2 diabetes from adult-onset in impact?

    • Longer disease duration with increased complications: Being diagnosed at a younger age means living longer with the disease, increasing the risk of complications like kidney failure, heart disease, and nerve damage throughout life. A 25-year-old with diabetes may face multiple health issues by age 40, compared to someone diagnosed at 55.
    • Greater loss in life expectancy: Individuals diagnosed before the age of 30 can lose up to 15 years of life expectancy, whereas older adults diagnosed later typically lose fewer years. A young adult may not survive past their 60s if the disease is poorly managed, while an older adult may live well into their 70s or 80s.
    • More disruption to personal and economic life: Early onset affects critical life stages like education, job opportunities, and family planning, placing greater mental and financial stress. A person in their 20s may have to drop out of college or limit employment due to frequent medical care needs.

    Why is early-onset diabetes a major concern for Indian health systems?

    • Rising burden on already stretched public healthcare: India’s healthcare system is under pressure from both infectious and non-communicable diseases. Early-onset diabetes increases the demand for long-term care, monitoring, and medication. A 2023 ICMR study found that more than 25% of diabetes cases in India are now diagnosed before the age of 40.
    • Economic impact on productivity and workforce: Early-onset diabetes reduces an individual’s healthy working years and impacts productivity, especially in labour-intensive sectors. According to the ICMR 2023 study, diabetic workers lose an average of 7–8 additional workdays annually, leading to reduced output, absenteeism, and rising employer costs.
    • Greater lifetime healthcare costs and complications: Early diagnosis leads to decades-long care, including medication, check-ups, and complication management, increasing costs for families and public health insurance. Eg: A young diabetic using insulin, requiring eye and kidney screenings, adds a heavy burden on schemes like Ayushman Bharat.

    How do socio-economic and environmental factors drive its rise?

    • Unhealthy food environments and marketing: Easy availability and aggressive marketing of processed and sugary foods through social media influence poor dietary habits among youth. Eg: Fast food delivery apps and influencer-driven trends promote ultra-processed snacks in urban areas like Delhi and Mumbai.
    • Inequality in access to healthcare and lifestyle management: Low-income groups lack access to nutritious food, safe exercise spaces, and preventive healthcare, increasing risks of obesity and diabetes. Eg: Children in urban slums of Kolkata face limited health awareness and inactivity, raising early-onset diabetes risk.
    • Impact of early-life undernutrition and developmental challenges: Poor maternal nutrition, low birth weight, and childhood undernourishment raise the chance of developing type 2 diabetes later, even without obesity. Eg: In rural Madhya Pradesh, undernourished children show insulin resistance despite having a low BMI.

    Why is prevention more effective than treatment in tackling this issue?

    • Reduces lifelong health burden and complications: Preventing diabetes avoids decades of medication, monitoring, and risks of complications like kidney or heart disease. Eg: Promoting physical activity and healthy diets in schools can reduce diabetes risk and future hospital visits.
    • More cost-effective for individuals and health systems: Prevention strategies like awareness campaigns and food policies cost less than long-term drug therapy and hospitalisation. Eg: Taxing sugar-sweetened beverages, adopted in over 100 countries, has reduced sugary drink sales and lowered obesity-related costs.
    • Addresses root causes and promotes healthy behaviours: Focusing on prevention changes social and environmental conditions that lead to obesity and diabetes. Eg: Urban planning with parks, pedestrian paths, and fitness centres encourages active lifestyles, lowering diabetes risk.

    Way forward:

    • Strengthen preventive public health strategies: Implement nationwide programs promoting healthy eating, physical activity, and early screening in schools and communities to reduce risk factors from a young age.
    • Ensure equitable access to care and awareness: Expand access to affordable diagnosis, lifestyle counselling, and essential medicines in both urban and rural areas, especially targeting low-income and high-risk groups.

    Mains PYQ:

    [UPSC 2022] The increase in life expectancy in the country has led to newer health challenges in the community. What are those challenges, and what steps need to be taken to meet them?

    Linkage: This question directly addresses “newer health challenges” and the steps required to meet them. The need for “urgent investment in prevention, early diagnosis and targeted care” mentioned in the article directly aligns with the “steps to be taken” aspect of this question.

  • India to host Regional Wing of International Potato Center (CIP)

    Why in the News?

    The Union Cabinet approved the establishment of the CIP-South Asia Regional Centre (CSARC) of the International Potato Centre (CIP) in Singna, Agra, Uttar Pradesh.

    About the International Potato Centre (CIP):

    • Establishment: The CIP was founded in 1971 in Lima, Peru, to promote research on potato, sweet potato, and Andean root crops.
    • Global Reach: CIP operates in South America, Africa, and Asia, focusing on sustainable agriculture and nutritional security.
    • India Collaboration: CIP began its work in India in 1975 through an agreement with the Indian Council of Agricultural Research (ICAR).
    • Germplasm Collection: It maintains the world’s largest germplasm bank for potato and sweet potato, making it central to crop breeding and biotech innovation.
    • Research Areas: CIP’s activities include crop improvement, pest and disease control, post-harvest technologies, and market linkages.
    • Partnership Model: The center works with local governments, agricultural institutions, and NGOs to develop climate-resilient, high-yielding varieties.

    Functions of the New Regional Center (CSARC) in India:

    • Location and Purpose: The new CIP-CSARC is being set up in Singna, Agra, to serve India and South Asia.
    • Core Focus: It will work on developing climate-resilient, disease-free, and processing-grade varieties of potato and sweet potato.
    • Food Security Goals: The center aims to enhance food and nutrition security, farmer income, and rural employment through improved productivity and value-added agri-products.
    • Global Linkages: It will provide Indian researchers access to CIP’s global network, innovations, and genetic resources.
    • Post-Harvest Development: It will strengthen seed quality, post-harvest systems, and improve India’s export potential in potato-based crops.
    • National Importance: This will be the second major international agri-research institute in India, after IRRI-SARC in Varanasi.

    Potato Cultivation in India:

    • About: Potato (Solanum tuberosum) is known as the “King of Vegetables” and is India’s fourth most important food crop after rice, wheat, and maize.
    • Origin: Introduced to India by Portuguese traders in the 17th century; It is a native crop of the Peruvian-Bolivian Andes.
    • Geographic Spread: Grown in 23 states, but 85% of production comes from the Indo-Gangetic plains in North India.
    • Global comparison: India is the second-largest potato producer globally after China, producing 51.3 million tonnes in 2020.
    • Top Producing States:  India’s average potato yield is 25 tonnes/hectare, which is only half the estimated potential of 50+ tonnes/hectare due to poor seed quality.
      • Uttar Pradesh: ~30% of total output
      • West Bengal: ~23.5%
      • Bihar: ~17%
      • Other contributors: Punjab, Gujarat, Madhya Pradesh
    • Climate Needs: Potato is a cool-season crop.
      • Ideal growth temp: 24°C
      • Ideal tuber formation temp: 20°C
    • Soil Requirements: Prefers well-drained, fertile soils with moisture retention.
    • Planting Seasons:
      • Himachal Pradesh, Uttarakhand: Spring (Jan–Feb), Summer (May)
      • Punjab, Haryana, UP, Bihar, Bengal: Main crop in October
      • MP, Maharashtra, Karnataka: Both kharif and rabi seasons
    • Seed Management: Use disease-free, sprouted seeds (30–50g);
    • Popular varieties: Kufri Jyoti, Kufri Bahar, Kufri Pukhraj, and Kufri Chandramukhi.
    • Fertilization & Irrigation: Apply balanced nutrients, especially phosphorus and potassium; drip irrigation is recommended.
    • Harvesting: Ready in 90–120 days, harvested manually or mechanically.

     

    [UPSC 2024] Consider the following plants:

    1. Groundnut 2. Horse-gram 3. Soybean

    How many of the above belong to the pea family?

    Options: (a) only one (b) only two (c) All three* (d) None

     

  • Agricultural Fungicides causing C. Tropicalis Infections

    Why in the News?

    Researchers at Fudan University found that overuse of the fungicide tebuconazole is causing azole-resistant Candida tropicalis to emerge — a deadly fungus with a 55–60% mortality rate.

    About Candida tropicalis:

    • Overview: Candida tropicalis is a fungal pathogen prevalent in tropical and subtropical regions, including India.
    • Type: It is a yeast species that causes invasive candidiasis, affecting the bloodstream and internal organs.
    • High-Risk Groups: The fungus is opportunistic, primarily infecting immunocompromised individuals such as cancer patients and those in ICUs.
    • Mortality Rate: The infection has a high mortality rate, estimated at 55–60% when it becomes systemic.
    • Drug Treatment: Standard treatments include azole-class antifungals such as fluconazole and voriconazole (widely used during COVID-19 induced Black Fungus).
    • Adaptability: The pathogen shows strong genomic plasticity, allowing it to survive hostile environments and develop drug resistance.

    Reasons for Spread and Resistance:

    • Agricultural Influence: Studies show that azole fungicides like tebuconazole, used in farming, contribute to azole-resistant C. tropicalis
    • Environmental Exposure: These fungicides accumulate in soil and water, promoting the evolution of resistant strains.
    • Genetic Adaptations: Resistant strains develop aneuploidy (extra chromosomes), aiding resistance but reducing growth in drug-free environments.
    • Efflux Pumps: Some strains duplicate genes like TAC1, boosting drug-efflux pumps (e.g., ABC transporters) to eject antifungals from the cell.
    • Increased Virulence: Resistant strains have proven more virulent in animal studies, posing greater public health risks.

     

  • Substandard Cancer Drugs: A Global Public Health Alarm

    Why in the News?

    A global investigation has revealed that vital chemotherapy drugs used in over 100 countries have failed quality tests, posing life-threatening risks to cancer patients.

    Various Drugs Used for Cancer Treatment:

    • Cisplatin is a platinum-based drug discovered in the 1960s. It binds to DNA in cancer cells and is widely used to treat testicular, ovarian, bladder, and lung cancers. It is known to cause kidney damage, hearing loss, and immune suppression.
    • Oxaliplatin is another platinum compound mainly used to treat advanced colorectal cancer. It works similarly to cisplatin but may also cause nerve-related side effects.
    • Cyclophosphamide is used for treating breast cancer, leukaemia, sarcoma, and lymphoma. It damages cancer cell DNA and lowers white blood cell counts, weakening the immune system. It can also cause bladder inflammation.
    • Doxorubicin, known as the “Red Devil”, is derived from soil bacteria and used against breast cancer, leukaemia, and sarcomas. It disrupts DNA replication but has serious side effects, including heart damage and hair loss.
    • Methotrexate blocks enzymes involved in DNA synthesis and is used for leukaemia, lymphoma, and various tumors. It is often followed by leucovorin, which helps protect normal cells from damage.
    • Leucovorin is not a chemotherapy drug but a supportive agent used with methotrexate to reduce toxicity. It is a form of vitamin B9 introduced in the 1950s.

    Recent Quality Test Failure

    • Investigation: A 2024 investigation revealed that chemotherapy drugs sold in over 100 countries failed basic quality standards.
    • Failure of Generics: The drugs tested were generics. Also, 189 unexpired samples were tested; 20% failed.
    • Indian Pharma Under Radar: 17 manufacturers were flagged, with 16 based in India. Drugs failed for containing either too little (under 88%) or too much (over 112%) active ingredient.
    [UPSC 2005] It begins as a single cell and grows into a merciless disease that claims millions of lives year after year. But scientists are steadily unlocking its mysteries, and the fight against it may now have reached a dramatic turning point. New discoveries promise better therapies and hope in the war against …” The disease referred to in the above quotation is:

    Options: (a) Cancer (b) AIDS (c) Tuberculosis (d) Alzheimer’s disease

     

  • What is Axiom-4 Mission?

    Why in the News?

    The launch of Axiom-4 (Ax-4), a private mission to the International Space Station (ISS), has finally lifted-off after several postponements due to weather conditions.

    About Axiom-4 Mission:

    • Axiom Mission 4 (Ax-4) is a private spaceflight organized by Axiom Space.
    • It aims to transport a crew to the International Space Station (ISS) for a 14-day mission.
    • This will be Axiom Space’s 4th mission to the ISS, following their previous missions (Ax-1, Ax-2, and Ax-3).
    • The mission will launch from the Kennedy Space Center in Florida using SpaceX’s Falcon 9 rocket.
    • The spacecraft for this mission is a SpaceX Crew Dragon, known for its advanced technology and safety features.
    • This mission is organised in collaboration with NASA, highlighting a strong partnership between private space companies and government space agencies to further space exploration and research.
    • Crew:
      1. Peggy Whitson: A veteran astronaut with extensive experience, having completed multiple missions to the ISS.
      2. SƂawosz Uznanski: A Polish astronaut joining the mission, marking a significant milestone for Poland in space exploration.
      3. Tibor Kapu: A Hungarian astronaut, adding to the diversity of the mission crew.
      4. Group Captain Shubhanshu Shukla: An Indian astronaut, making headlines as part of this international crew.

    Significance of Ax-4 Mission for India

    • The mission is a collaborative effort resulting from an agreement between ISRO and NASA.
    • It provides ISRO with an early opportunity to test experiments in space, originally planned for Gaganyaan.
    • Key Indian Experiments on Axiom-4:
      • Microgravity’s impact on muscle dysfunction.
      • Use of computer screens in zero gravity and their effects on human cognition and vision.
      • Growth of six varieties of crop seeds in space conditions.
      • Tardigrade survival study—these microscopic creatures can endure extreme environments and may provide insight into life support systems in space.

    Back2Basics: International Space Station (ISS)

    • The ISS, orbiting 430 kilometres above Earth, completes 16 orbits daily, witnessing 16 sunrises and sunsets.
    • It orbits Earth every 90 minutes at 8 km per second.
    • Spanning 109 meters, it’s almost as long as an American football field.
    • It includes 6 sleeping areas, 2 bathrooms, a gym, and a panoramic view bay window.
    • Its solar array wingspan is 109 meters, and the station houses about 13 km of electrical wiring.
    • Its journey began on November 20, 1998, with Russia’s Zarya Control Module.
    • The US added the Unity Node 1 module on December 4, 1998, marking the start of a functional space lab.
    • It evolved into its current form after 42 assembly flights.

     

    PYQ:

    [2019] What is India’s plan to have its own space station and how will it benefit our space programme?