October 2025
In short: India's science, environment and technology this month — distilled for SI/Constable Prelims.
Current Affairs — India › Science, Environment & Technology · 26 min read · Free to read · English & Telugu
Bilingual study notes for the Andhra Pradesh Police SI & Constable exams (SLPRB AP) by AP Police Hub, a product of Anvil Academy.
October 2025's science digest — INS Androth and the Saksham drone-defence grid, all six 2025 Nobel Prizes, Maitri-2 in Antarctica, India's climb to 9th in forest area, the Diethylene Glycol cough-syrup deaths, and a wide sweep of health, space and biotech news.
Asian elephant (Elephas maximus), Kaziranga — India's first DNA-based elephant census (SAIEE 2021-25) estimated the wild population at 22,446 · Aparajita Datta / Wikimedia Commons (CC BY-SA 4.0)
October 2025 — At a Glance
October is 'Nobel month' — all six 2025 Nobel Prizes were announced. India commissioned INS Androth and its indigenous Saksham anti-drone grid, won approval for the Maitri-2 Antarctic station, and climbed to 9th place globally in forest area — even as a tainted cough syrup killed 14 children in Madhya Pradesh and a crowd crush in Karur exposed gaps in disaster management.
1. Defence, Maritime & Space Technology
Indian Navy commissions INS Androth
- What — INS Androth, the 2nd Anti-Submarine Warfare Shallow Water Craft (ASW-SWC), commissioned at Naval Dockyard, Visakhapatnam; built by GRSE, Kolkata, with 80%+ indigenous content.
- Note — First ship in the series, INS Arnala, was commissioned in June 2025; named after Androth Island, Lakshadweep.
Saksham Counter-Unmanned Aerial System (CUAS) Grid
- What — Indigenously developed with Bharat Electronics Limited; detects, tracks and neutralises hostile drones in real time with AI-enabled predictive threat analysis.
Joint military exercises
- Konkan-25 (India-UK) — First-ever bilateral carrier strike group exercise between navies — INS Vikrant's CSG and UK's HMS Prince of Wales CSG, off India's western coast.
- Trishul, AUSTRAHIND, JAIMEX — Tri-service Trishul along the western Pakistan border (Gujarat/Rajasthan); AUSTRAHIND 2025 (4th edition) with Australia in Perth; JAIMEX-25 with Japan at Yokosuka; a new India-South Korea naval exercise held at Busan.
Indian Radio Software Architecture (IRSA) 1.0
- What — DRDO's IRSA is India's first national specification for Software-Defined Radios, ensuring interoperability and self-reliance in military communications.
ISRO's Crew Escape System & other space milestones
- Crew Escape System — ISRO validated a cost-effective test vehicle (Vikas engine) for the Gaganyaan Crew Escape System — pulls the crew module to safety in a launch abort.
- HAL-Sukhoi SJ-100 — HAL and Russia's UAC signed an MoU to produce the Sukhoi Superjet SJ-100 civil commuter jet (103 seats) in India.
- High-RRR Niobium — Nuclear Fuel Complex, Hyderabad, developed indigenous tech for High Residual Resistivity Ratio Niobium — a key material for superconducting accelerators, earlier fully imported.
- Tejas Mk1A maiden flight — The first Tejas-Mk1A fighter produced at HAL's Nashik complex completed its maiden flight.
2. Environment, Climate & Wildlife
India's forest-area ranking climbs — GFRA 2025
- What — FAO's Global Forest Resources Assessment: India climbs from 10th to 9th globally in total forest area, and stays 3rd in annual forest-area growth (~191,000 hectares/year, after China and Russia).
- Global context — Total world forest area ~4.14 billion hectares (~32% of land); 54% of it concentrated in just 5 countries — Russia, Brazil, Canada, US, China.
Maitri-2 — India's 4th Antarctic research station
- What — In-principle approval given; will be built in the Schirmacher Oasis, East Antarctica, near the existing Maitri Base, by NCPOR, Goa (Ministry of Earth Sciences).
- Details — Hosts ~90 scientists in summer, ~40 in winter; 30-45 year operational life; solar + wind powered; India's stations so far: Dakshin Gangotri (1983, decommissioned), Maitri (1989), Bharati (2012).
Wildlife assessments & conservation
- Elephant population (SAIEE 2021-25) — India's first DNA-based elephant census estimates the wild population at 22,446 — an 18-25% decline from 2017; Karnataka has the most (~6,013), Western Ghats the largest stronghold (53%).
- National Red List Roadmap 2025-2030 — First-of-its-kind roadmap to assess extinction risk for ~11,000 species (7,000 flora, 4,000 fauna); led by MoEFCC with ZSI, BSI and WII; National Red Data Books targeted by 2030.
- #23for23 & Snow Leopards — Launched on International Snow Leopard Day (23 Oct); India's first Snow Leopard Census (SPAI, 2019-23) recorded 718 individuals, Ladakh highest.
- Species revival & sightings — Blackbucks revived after ~50 years locally extinct at Chhattisgarh's Barnawapara Wildlife Sanctuary; global Green Sea Turtle population up 28% since the 1970s (IUCN); Bombay HC panel to protect Mumbai's Sanjay Gandhi National Park.
Global environmental reports & institutions
- IUCN World Heritage Outlook 2025 — 4th edition, launched in Abu Dhabi; of 271 sites assessed, 46 rated 'Good', 17 'Critical'; 43% of sites face severe climate threats.
- Blue Flag Certification — 5 Maharashtra beaches (Raigad district) certified, taking India's total to 18; awarded by Denmark's FEE under the BEAMS project.
- Adaptation Gap Report 2025 — UNEP's 'Running on Empty' report — developing countries' 2035 adaptation-finance needs are 12× current international flows ($26bn in 2023); ahead of COP30 in Belém, Brazil.
- State of Finance for Forests 2025 — UNEP's first SFF report: global forest investment must triple by 2030 (from ~84bn to ~300bn/year); only ~$14bn invested in 2023, 91% public.
- AmazonFACE Experiment — A large-scale free-air CO₂ enrichment experiment near Manaus, Brazil, studying how the Amazon rainforest will respond to elevated CO₂ levels expected by 2050-60.
- Green Fireworks — SC eased Delhi-NCR's blanket firecracker ban to allow NEERI/PESO-approved 'green fireworks' for Deepavali — ≥30% less particulate/gas emissions, QR-code traceable.
Disasters & places in the news
- Darjeeling floods — Unrelenting rain triggered floods/landslides in Darjeeling and Nepal, killing 70+ people — the region sits near the strategic Siliguri Corridor ('Chicken's Neck').
- Kedartal GLOF survey — The Uttarakhand glacial lake (near Gangotri, 4,750 m) will undergo detailed survey under the National GLOF Risk Mitigation Programme.
- Saranda Forest relief — SC granted relief to Jharkhand government in a dispute over declaring Saranda — Asia's largest contiguous Sal forest — a wildlife sanctuary.
- Foreign disasters (brief) — A 7.4-magnitude earthquake off Mindanao, Philippines, triggered a tsunami warning; Typhoon Halong caused mass evacuations on Japan's Izu Islands.
- Axial Seamount — NOAA reported renewed volcanic activity at this underwater shield volcano off the US Pacific Northwest — hosts unique hydrothermal-vent ecosystems studied for astrobiology.
3. Health, Medicine & Public Safety
Diethylene Glycol — Coldrif cough-syrup deaths
- What — At least 14 children in Madhya Pradesh died after consuming Coldrif syrup contaminated with the toxic industrial solvent Diethylene Glycol (DEG), causing acute kidney injury.
FSSAI bans fake 'ORS' drinks
- What — Following a paediatrician-led campaign, FSSAI barred companies from labelling sugar-rich drinks 'Oral Rehydration Salts (ORS)' unless meeting the WHO formulation standard.
India's response to crowding disasters
- What — A crowd crush at a Karur, Tamil Nadu political rally killed 41 people, renewing focus on India's weak crowd-management systems and scientific crowd management under the NDMA framework.
Disease & health-hazard watch
- Crohn's Disease — New research links diets high in ultra-processed foods to worsening flare-ups of this chronic inflammatory bowel disease.
- Trichloroethylene (TCE) — Long-term outdoor exposure to this industrial solvent linked to increased Parkinson's disease risk.
- Zombie Deer Disease — Florida confirmed cases of Chronic Wasting Disease — a fatal prion disease of deer/elk/moose; no confirmed human cases yet.
- Calcium Carbide — 60+ people, mostly children, hospitalised in Bhopal from makeshift 'calcium carbide guns' during Diwali — the chemical is separately banned as a fruit-ripening agent.
- Fibromyalgia — A chronic condition causing widespread muscle pain, fatigue and sleep/mood issues; no specific diagnostic test, managed with medication and CBT.
- False Smut Disease — Fungal disease ('Haldi Rog') infested Punjab's paddy crop after incessant rain — causes 7-25% (up to 75%) yield loss.
Medical innovations & missions
- Nafithromycin — India's first indigenously discovered antibiotic (developed by Wockhardt with BIRAC support) — treats drug-resistant Community-Acquired Bacterial Pneumonia, 10× stronger than azithromycin.
- Sinapic Acid — Nagaland University researchers identified this plant compound as capable of accelerating wound healing in diabetic conditions.
- Oral Cholera Vaccine — Shanchol — Received WHO prequalification, enabling global procurement via UNICEF/Gavi/PAHO — a bivalent killed whole-cell vaccine.
- MAHA MedTech Mission — ANRF-ICMR-Gates Foundation 5-year mission to boost indigenous MedTech innovation in devices, diagnostics and implants, prioritising TB, cancer and neonatal care.
- Biomedical Research Career Programme III — Cabinet approved BRCP Phase III (₹1,500 crore, DBT + Wellcome Trust, 2025-31) — to train 2,000+ biomedical researchers.
- Global Virus Network — This voluntary consortium of virology labs (est. 2011, Baltimore) expanded with 3 new Centers of Excellence in the Americas.
4. Research, Space Science & Digital Technology
All six 2025 Nobel Prizes
The 2025 Nobel Prizes| Category | Laureate(s) | For |
|---|
| Medicine | Brunkow, Ramsdell, Sakaguchi | Regulatory T cells (Tregs) — peripheral immune tolerance |
| Physics | Clarke, Devoret, Martinis | Quantum tunnelling in superconducting circuits |
| Chemistry | Robson, Kitagawa, Yaghi | Metal-Organic Frameworks (MOFs) |
| Economics | Mokyr, Aghion, Howitt | Innovation-driven economic growth |
| Peace | María Corina Machado (Venezuela) | Pro-democracy opposition leadership |
| Literature | László Krasznahorkai (Hungary) | Visionary novels amid 'apocalyptic terror' |
- Medicine — key detail — Discovered Regulatory T cells (Tregs) and the Foxp3 gene — explains why the immune system doesn't attack the body's own cells.
- Physics — key detail — Proved quantum effects exist in visible, man-made Josephson-junction circuits — foundation of superconducting qubits in quantum computers.
- Literature — key detail — Krasznahorkai is only the 2nd Hungarian Literature laureate, after Imre Kertész (2002); known for *Satantango* (1985).
Space & astronomy
- IMAP — NASA's Interstellar Mapping and Acceleration Probe, launched to map the heliosphere's boundary and improve space-weather forecasting from the Sun-Earth L1 point.
- Phosphine on Wolf 1130C — James Webb Space Telescope detected phosphine (PH₃) in the atmosphere of brown dwarf Wolf 1130C — on Earth it's biogenic, on Jupiter/Saturn it's chemical in origin.
- Cassini data — Enceladus — Fresh analysis of NASA's Cassini spacecraft data adds evidence that Saturn's moon Enceladus, with hydrothermal vents and mineral-rich water, may support life.
- Plutonium (explainer) — By-product of Uranium-238 neutron capture; Pu-239 is fissile (reactors/weapons), Pu-238 powers space missions; global civil stock ~260 tonnes.
Digital & agri-tech initiatives
- RDI Scheme — ANRF's ₹1 lakh crore Research, Development & Innovation Scheme provides low/zero-interest financing for private R&D in strategic sectors, governed by a Board chaired by the PM.
- Scheme to attract 'Star Faculty' — New scheme to bring Indian-origin STEM scientists back from abroad — addresses India's R&D spend of just 0.7% of GDP (vs US 2.8%, China 2.4%) and non-competitive pay.
- SOAR & SITAA — Skilling for AI Readiness (SOAR) brings AI modules to Classes 6-12 (₹500 crore); UIDAI's SITAA scheme boosts ID-tech innovation in face-liveness detection and contactless authentication.
- DRAVYA & AgriEnIcs — Ayush Ministry's DRAVYA portal catalogues 100 medicinal substances; MeitY's AgriEnIcs deploys AI/IoT solutions (cattle-health monitors, grain-quality analysers) for agriculture.
- Insecure Direct Object Reference (IDOR) — A major data-leak flaw (exposed internal object IDs) was fixed on India's income-tax e-filing portal before exploitation.
- Intrusion Detection System (elephants) — Northeast Frontier Railway trialled a sensor/AI-based system using optical-fibre cables to detect elephants near tracks and alert loco-pilots in real time.
- SAIME Model — West Bengal's Sundarbans Sustainable Aquaculture in Mangrove Ecosystems model got FAO Global Technical Recognition — over 100% profit rise for farmers via mangrove-conservation-linked aquaculture.
- CRYODIL — ICAR-NIANP, Bengaluru, developed India's first egg-yolk-free buffalo semen cryopreservation medium — 18-month shelf life, higher post-thaw fertility.
- Rhodamine B detection — Raman Research Institute scientists developed a low-cost technique using the 'coffee-stain effect' to detect this toxic pink synthetic dye, often illegally used in food.