UPSC CSE Why

An underrated yet highly rewarding topic, UPSC asks 2–3 questions every year from it. Save this post and Revise with CSEWhy😊

@CSEWhy Times – Dec 30, 2025

Pre & Mains Notes

1) INSV Kaundinya sails to Oman What happened • Indian Navy’s sailing vessel set sail from Gujarat to Muscat, Oman, retracing ancient maritime trade routes. • Maiden journey of the two-masted sailboat with a specially trained naval crew. Key facts / concepts • INSV Kaundinya is a stitched ship inspired by a 5th-century CE vessel depicted in Ajanta cave paintings. • Built using traditional stitching techniques by artisans from Kerala under a tripartite project involving the Ministry of Culture, Indian Navy, and Hodi Innovations. UPSC angles • Prelims: INSV Kaundinya, stitched ship technology, Ajanta cave depictions. • Mains: maritime heritage, cultural diplomacy, revival of traditional technologies. 2) Concerns over Indian rabies vaccine and treatment protocol What happened • Australia, the UK, and the US issued advisories asking citizens bitten by dogs in India to check if additional rabies vaccine doses are needed. • Advisory followed detection of faulty packaging linked to potential diversion of genuine rabies vaccines in India. Key facts / concepts • Rabies is transmitted through saliva of infected animals and is nearly 100% fatal once symptoms appear, but preventable through post-exposure vaccination. • WHO schedule requires three intramuscular and two intradermal doses, with immunoglobulin given on the day of the bite; fewer boosters needed if previously immunised. • Testing by India’s Central Drugs Testing Laboratory found vaccines genuine, but outer packaging was altered to divert supply. UPSC angles • Prelims: rabies transmission, WHO post-exposure prophylaxis protocol. • Mains: public health surveillance, vaccine supply chains, zoonotic disease control.

@CSEWhy Newspaper Recos

Indian Express🗞 1. AI that you can hold in your hand, and that holds your hand (must read) 2. To tap India's clean energy potential, a to-do list (read for awareness, take pointers for mains answers) The Hindu 📰 1. The quiet foundations for India’s next growth phase (read for awareness) 2. What is the India-New Zealand FTA? (read for general awareness)

@CSEWhy Times – Dec 29, 2025

Pre & Mains Notes

1) Frequency comb as a colour (frequency) reference What happened • Frequency comb explained as a laser-based tool that emits many evenly spaced light frequencies instead of a single colour. Key facts / concepts • Generated using a mode-locked laser that emits short light pulses at a steady, regular rate. • Enables comparison of an unknown light frequency with a highly stable reference by matching the closest “tooth” of the comb. • Used for calibrating atomic clocks and measuring tiny shifts in light frequency caused by gravity. UPSC angles • Prelims: frequency comb, mode-locked laser, atomic clock calibration. • Mains: applications of precision measurement technologies in fundamental physics and space science. 2) Alaknanda: implausibly old spiral galaxy discovered What happened • Indian astronomers discovered a spiral galaxy, named Alaknanda, dating back to when the universe was about 1.5 billion years old. • The discovery challenges existing models of galaxy formation that expect such structures to appear much later. Key facts / concepts • Detected using James Webb Space Telescope (JWST) data; shows a well-defined spiral structure without a central bulge. • Current models suggest early galaxies were chaotic; Alaknanda appears smooth, stable, and mature. • Two formation explanations considered: gradual gas accretion or merger with a smaller companion galaxy. UPSC angles • Prelims: JWST, spiral galaxy characteristics. • Mains: limitations of existing cosmological models and role of advanced telescopes in astronomy.

@CSEWhy Newspaper Recos

Indian Express🗞 : none today The Hindu 📰 1. A grand vision and the great Indian research deficit (read for awareness) 2. Linked civilisations, a modern strategic partnership (beautifully written) 3. What are rare-earth elements and why is everyone looking for them? (MUST read)

"Kinder Joy to Polity Joy: Elements of Indian Parliament"🙈

This question on languages was asked in UPSC Prelims 2024, How to remember the languages added later via CAAs? Trick:- Sindhi Konkan MaN BDSM Sindhi - 21st CAA Konkani,Manipuri,Nepali - 71st CAA Bodo,Dongri,Santhali,Maithili - 92nd CAA Save this post and revise😊

1) Indian Army Social Media Policy Revision Key Points • Indian Army revised its social media guidelines to allow passive participation by personnel. • Access permitted only for viewing and monitoring content, not interaction. • Platforms like Instagram, X, YouTube allowed only in restricted-use mode. • Active engagement including posting, commenting, sharing, messaging remains prohibited. • Limited use of messaging apps allowed only for unclassified information with known individuals. • Policy issued by Army HQ through the Directorate General of Military Intelligence (DGMI). Why in News? • Indian Army relaxed earlier blanket restrictions on social media usage for its personnel. Mains Relevance • GS3: Balancing operational security with controlled use of digital platforms in armed forces. • GS3: Cyber security and information warfare concerns in defence institutions. • Prelims Pointers • Passive participation means viewing content without interaction. • DGMI functions under Army Headquarters. • Active social media engagement remains prohibited. 2) ISRO’s Expanding Launch Capabilities Key Points • ISRO launched LVM3-M6 carrying a 6,100 kg commercial satellite. • Demonstrated heavy-lift capability for low Earth and geosynchronous orbits. • Achieved satellite docking and undocking through SpaDeX mission. • Conducted NISAR, a joint India–US Earth observation mission. • Targeting multiple launches including uncrewed Gaganyaan mission. Why in News? • ISRO concluded the year with milestone launches showcasing new technological capabilities. Mains Relevance • GS3: Advancement of indigenous space technology and strategic autonomy. • GS2: International collaboration in space science and commercial space economy. Prelims Pointers • LVM3 is India’s heavy-lift launch vehicle. • NISAR uses dual-frequency Synthetic Aperture Radar. • Gaganyaan is India’s human spaceflight programme. 3) Judicial Review of Special Marriage Act Provisions Key Points • Delhi High Court can test constitutional validity of Special Marriage Act provisions. • Challenge concerns mandatory 30-day public notice under Sections 6 and 7. • Petitioners cite violation of privacy, liberty, and personal autonomy. • Supreme Court declined transfer of case from Delhi High Court. • Similar issue pending before Supreme Court in another petition. Why in News? • Delhi High Court resumed hearing after Supreme Court rejected Centre’s transfer plea. Mains Relevance • GS2: Judicial review of legislation vis-à-vis fundamental rights. • GS2: Tension between individual privacy and state regulation of marriage. Prelims Pointers • Special Marriage Act enacted in 1954. • Section 6 mandates public notice of intended marriage. • Section 7 deals with objections to marriage. 4) Rabies as a Public Health Challenge in India Key Points • India accounts for nearly 20,000 rabies deaths annually, the highest globally. • Rabies is endemic in India and dogs are the primary reservoir. • Poor access and affordability of post-exposure prophylaxis. • Acute shortage of rabies immunoglobulin. • Control requires dog vaccination, sterilisation, and public awareness. Why in News? • Reports highlighted India’s high rabies burden and healthcare gaps. Mains Relevance • GS2: Public health governance and prevention of zoonotic diseases. • GS2: Role of local bodies in animal control and disease prevention. Prelims Pointers • Rabies is caused by a Lyssavirus. • Post-exposure prophylaxis includes wound washing, vaccine, and immunoglobulin. • Rabies is 100 percent fatal but preventable.

@CSEWhy Times – Dec 26, 2025

Pre & Mains Notes

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@CSEWhy Newspaper Recos

Indian Express🗞 1. Japan to test mine rare-earth mud from deep seabed. 2.The good news is,lower-income states are catching up(Editorial) 3.In Indian ocean region,100 villages to be tsunami-ready. 4.In HC suspension of Sengar sentence,the key role of 'public servant' definition. The Hindu 📰 1.A year of dissipating promises for Indian foreign policy(Editorial) 2.The urban future with cities as dynamic ecosystems(Editorial)

India's Rice line is interesting BUT do you know Premium rice quality? See😉👇 These are traditional varieties mentioned by PM Modi in his blog. Mapillai Samba • Traditional rice of Tamil Nadu • High nutritional value • Linked with strength & stamina • Symbol of agrobiodiversity conservation Karuppu Kavuni • Traditional rice of Tamil Nadu • Indigenous black rice variety • Rich in anthocyanins (antioxidants) • Used in nutraceutical & health foods Save this post for UPSC😊

Pre & Mains Notes

1) Maternal mortality declined with rise in institutional deliveries What happened • Institutional deliveries increased to 89%, contributing to a significant decline in Maternal Mortality Ratio (MMR). Key facts / concepts • Institutional delivery means childbirth conducted in health facilities under trained medical personnel. • Expansion of healthcare infrastructure includes medical colleges and Ayushman Arogya Mandirs. • Two new medical colleges in Dhar district, Madhya Pradesh, are being set up under PPP model. UPSC angles • Prelims: institutional delivery as a key public health indicator. • Mains: linkage between healthcare infrastructure and maternal health outcomes. --- 2) Need to tackle misinformation and digital fraud What happened • President of India called for addressing misinformation and digital fraud at individual, institutional, and community levels. Key facts / concepts • Digital fraud includes phishing, online abuse, and misuse of digital platforms. • Social media has both constructive and destructive potential for national security. • Fundamental Duties assign responsibility to citizens for safeguarding national unity and integrity. UPSC angles • Mains: misinformation as a non-traditional internal security challenge. • Prelims: citizen duties related to national security. --- 3) Critical minerals essential for national security and technological sovereignty What happened • Air Marshal Ashutosh Dixit highlighted the strategic importance of critical minerals for defence and technology. Key facts / concepts • Modern defence systems depend on minerals for missiles, radars, satellites, batteries, and semiconductors. • Critical mineral supply chains are highly concentrated and geopolitically vulnerable. • India has launched initiatives like the National Critical Mineral Mission. UPSC angles • Prelims: examples and uses of critical minerals. • Mains: mineral security and strategic autonomy. --- 4) 100 years of Radio Ceylon and regional broadcasting What happened • Radio Ceylon completed 100 years since beginning broadcasts in December 1925. Key facts / concepts • One of the world’s oldest radio broadcasters and the first in Asia. • Operated as Radio SEAC during World War II; reverted to Radio Ceylon after Sri Lanka’s independence in 1948. • Broadcast multilingual content across South Asia, creating a shared cultural space. UPSC angles • Prelims: early broadcasting history in South Asia. • Mains: role of media in cultural integration across regions.

@CSEWhy Times – Dec 24, 2025

Pre & Mains Notes

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@CSEWhy Newspaper Recos

Indian Express🗞 1. entire Explained page The Hindu 📰 1. The VB-G RAM G Act 2025 fixes structural gaps 2. How exports are concentrated in few States

Important Newspapers and Magazines during Indian Freedom Struggle. This is not an ordinary image, Many UPSC PYQs have been asked from this single image.

@CSEWhy Times – Dec 23, 2025

@CSEWhy Newspaper Recos

Indian Express🗞 1. In Bangladesh, fake promises and a false enemy (read for awareness) 2. Aravalli benchmark could have effects beyond mining (just read for basic awareness) The Hindu 📰 1. Putin’s visit to India and the aftermath (don't be worried if you don't understand this) 2. On the right to a healthy environment (imp read) 3. How are we protecting astronauts from deadly space debris? (fun read on upcoming industry)

@CSEWhy Times – Dec 22, 2025

Pre & Mains Notes

1. Superkilonova: double whammy What happened Astronomers identified evidence of a rare cosmic event called a superkilonova, observed about 1.3 billion light-years away. What is it A superkilonova occurs when a massive star explodes into two neutron stars (supernova), which later merge to produce a kilonova. Why it is different Unlike a normal kilonova, additional energy comes from fallback material heating the ejecta, making it brighter, bluer, and longer-lasting. Why it matters Such events help explain the origin of heavy elements like gold and platinum and improve understanding of extreme stellar evolution. 2. Curbing elephant deaths on railway tracks What happened A passenger train hit and killed elephants in Assam, renewing focus on wildlife deaths caused by rail infrastructure. The scale of the problem Train collisions are a leading cause of elephant deaths in India, alongside electrocution and habitat fragmentation. Current solutions AI-based early warning systems, camera traps, GPS telemetry, and sensor-based alerts are being piloted in several railway zones. What works best Well-designed wildlife crossings (underpasses, overpasses) combined with fencing can reduce mortality by up to 98%. Why it matters Balancing infrastructure expansion with biodiversity protection is critical in elephant corridors and forest landscapes.

@CSEWhy Newspaper Recos

Indian Express🗞 1. GDP is growing why isn’t private capex? 2. ⁠Reforming fertilizer subsidy demands political courage, offer high rewards 3. ⁠Not English, neglect of rich bhashas is the problem The Hindu 📰 1. Unlocking the potential of India-Africa economic ties 2. ⁠What is Aland voter fraud case?

You'd thank me for this :)

EPFO results out. Did you make it?

Buddhist Councils. Quick revision along with Mnemonics.

Which Indian states share borders with Bangladesh? One map explains all.

Species in the News. Very important topic, UPSC asks questions from this area every year. Don't miss these easy marks in the exam,save it.😊

This is all you need to know about Aravallis. This will give you the whole context,why it is in the News.

@CSEWhy Times – Dec 21, 2025 spend time with today's Science & Explained in The Hindu. no particular notes, read the articles by self :)