17 May 2025

• Security: Exercise Teesta Prahar, India's first large-scale inter-services military exercise post-Operation Sindoor, was conducted in North Bengal.
• Science: Indian researchers sequenced the complete genome of the Indian Yak for the first time.
• Polity: Prime Minister articulated the 3-Pillar National Security Doctrine, codifying India's post-Sindoor strategic posture.
• Ecology: Nanoporous desalination membrane technology developed at IISc, Bangalore could reduce energy consumption by 40 per cent.
• International: India's Bharat Biotech agreed to supply oral cholera vaccines to Gavi (the Vaccine Alliance) for global health programmes.

GS area: National Security, Defence, Internal Security

India conducted its first large-scale inter-services military exercise after Operation Sindoor.

• Location: North Bengal (Teesta river corridor), near the Siliguri Corridor (Chicken's Neck).
• Participants: Indian Army, Indian Air Force, Border Security Force and Assam Rifles.
• Purpose: Test inter-service coordination, readiness in a multi-domain environment and integration of air and ground forces along the eastern front.
• Siliguri Corridor context: A narrow 22-km-wide strip connecting Northeast India with the mainland. Bordered by Nepal (north-west) and Bangladesh (south). Strategic vulnerability because the corridor can be severed to isolate Northeast India. China's DOKA LA is approximately 130 km away.
• Significance post-Sindoor: The exercise signalled India's readiness on both western and eastern fronts simultaneously, serving as strategic deterrence.

Static linkage: India's national security, North-East security, inter-service coordination, Chicken's Neck.

GS area: Science and Technology, Biodiversity, Agriculture

Indian scientists at the National Research Centre on Yak (NRCY), Dirang, Arunachal Pradesh, completed the first full genome sequence of the Indian Yak.

• Species: Bos grunniens (domestic yak). Indian yaks are genetically distinct from Tibetan yaks.
• Location of NRCY: Dirang, West Kameng district, Arunachal Pradesh.
• Population and distribution: About 58,000 yaks in India. Found in high-altitude areas of Ladakh, Himachal Pradesh, Uttarakhand, Sikkim and Arunachal Pradesh.
• Economic importance: Yaks provide milk, meat, wool (fibre), leather and draught power to pastoralist communities. Yak wool produces Khullu, a premium textile.
• Adaptation: The genome reveals genetic adaptations to hypoxia (low oxygen), extreme cold and high-altitude foraging. Key adaptations include changes in EPAS1 gene (hypoxia-inducible factor pathway).
• IUCN status: Vulnerable (wild yak Bos mutus).

Static linkage: Animal husbandry, biodiversity, genome sequencing, high-altitude ecosystems.

GS area: International Relations, National Security, Polity

The Prime Minister codified India's post-Operation Sindoor security posture into a formal doctrine.

• Pillar 1: Decisive and proportionate retaliation on India's terms, not those dictated by adversaries.
• Pillar 2: Zero tolerance for nuclear blackmail. India will not be deterred from conventional military action by nuclear threats. This directly addresses Pakistan's doctrine of sub-conventional provocation backed by nuclear deterrence.
• Pillar 3: No distinction between terrorists and their state sponsors. Host states are equally accountable. This extends liability beyond non-state actors to Pakistan's Army and ISI.
• Doctrinal evolution: From Nehru's Panchsheel (1954) to non-alignment to "strategic restraint" (1998-2016) to "strategic assertiveness" post-2016.
• International law basis: Article 51 of the UN Charter (right of self-defence), the "unwilling or unable" doctrine.

Static linkage: India's foreign policy, nuclear doctrine, counter-terrorism, Operation Sindoor.

GS area: Science and Technology, Environment, Water

Indian scientists developed an energy-efficient nanoporous membrane for water desalination.

• Developer: Indian Institute of Science (IISc), Bangalore.
• Technology: Graphene oxide nanoporous membranes allow selective ion rejection. Pore sizes of 1-2 nanometres allow water molecules through but block salt ions.
• Energy saving: Could reduce energy consumption by 40 per cent compared to conventional Reverse Osmosis (RO) desalination.
• Global context: Over 2 billion people face water stress. Desalination of seawater is essential for water security in coastal arid regions. Conventional RO requires 3-4 kWh per cubic metre.
• India's desalination potential: Over 7,500 km of coastline. Tamil Nadu, Gujarat and Rajasthan face acute water shortages. NITI Aayog designated desalination as a strategic priority.

Static linkage: Water security, renewable energy, technology, environment.

GS area: Health, International Relations, Governance

Bharat Biotech signed an agreement with Gavi to supply oral cholera vaccines for global health programmes.

• Gavi: The Vaccine Alliance, established 2000. Public-private partnership including WHO, UNICEF, World Bank, Gates Foundation and vaccine manufacturers. Provides affordable vaccines to low-income countries. Headquarters: Geneva, Switzerland.
• Bharat Biotech's vaccine: Hillchol, an oral cholera vaccine developed in India. Single-dose formulation for adults and two-dose for children.
• Global cholera burden: An estimated 1.3-4 million cases and 21,000-143,000 deaths annually. WHO declared cholera a global emergency in 2022-23 with outbreaks across Africa and Asia.
• India's strategic goal: Becoming a dominant supplier of global health solutions as part of India's vaccine diplomacy.

Static linkage: Global health, vaccine diplomacy, bilateral health cooperation.

• ASEAN's 2025 chair: Malaysia. Theme: "Inclusivity and Sustainability."
• Asiatic Cheetah: Iran holds the last wild population. Fewer than 12 individuals confirmed in 2025. Listed as Critically Endangered.
• Conus gloriamaris: Known as "Glory of the Seas," one of the world's rarest shells. Found in the Philippines and parts of the Indo-Pacific.
• Sittwe Port (Myanmar): Being revived under India's Kaladan Multi-Modal Transit Transport Project. Links Kolkata to Sittwe by sea, then via the Kaladan River to Mizoram. Connects landlocked Northeast India to Bay of Bengal trade routes.