31 December 2025 - Daily Current Affairs Updates

GS–1 | GEOGRAPHY & ENVIRONMENT

1. Kolleru Lake

Subtopic: Wetlands, River Systems & Avian Biodiversity

Value Addition:

• Geographical Setting:

  • Located in Andhra Pradesh, near Eluru.

  • Lies in the inter-deltaic plain of Krishna and Godavari rivers.

• Hydrological Role:

  • Acts as a natural flood-balancing reservoir for both river systems.

• Area & Seasonal Variation:

  • Normal spread: ~308 sq km.

  • Peak flood extent: up to 954 sq km.

• Physical Nature:

  • Shallow freshwater lake.

  • Largest freshwater lake in Andhra Pradesh.

• Inflow Sources:

  • Rivers: Budameru, Ramileru, Tammileru, Errakalva.

  • Supplemented by 18 major drains.

• Outflow:

  • Drains into the Bay of Bengal through Upputera channel.

• Ecological Importance:

  • Known as “Peerless Fisherman’s Paradise and Bird Heaven”.

• Legal Protection:

  • Declared Wildlife Sanctuary (1999).

  • Designated Ramsar Site (2002).

• Avifauna:

  • Hosts 20+ million migratory birds annually.

  • Species include grey pelican, painted stork, open-billed stork.

• Migration Corridor:

  • Birds arrive from Siberia, Central Asia, and the Himalayas.

• Livelihood Linkages:

  • Supports fishing, duck rearing, and paddy cultivation for local communities.

Subject Analysis:

• Classic GS-1 case of wetland geography + river systems.

• High relevance for Ramsar sites, flood moderation, and migratory bird habitats.

• Useful for mapping-based prelims questions.

GS–1 | ART & CULTURE / RELIGIOUS HISTORY

2. Srimanta Shankar Dev

Subtopic: Bhakti Movement, Social Reform & Assamese Culture

Value Addition:

• Period: 1449–1568.

• Birthplace: Aali-pukhuri, present-day Nagaon district, Assam.

• Identity:

  • Saint-scholar, reformer, polymath.

  • Central figure in Assam’s religious and cultural renaissance.

• Religious Philosophy:

  • Founded Eka-Sarana Hari-Nama Dharma.

  • Emphasised devotion to Lord Krishna as the sole deity.

  • Rejected ritualism, caste hierarchies, and sectarianism.

• Institutional Contributions:

  • Established Namghars (community prayer halls).

  • Founded Sattras (monastic and cultural centres).

• Social Reform:

  • Opposed caste discrimination.

  • Promoted social equality and dignity of women.

• Literary Works:

  • Kirtana Ghosha, Bhakti Pradipa, and devotional translations.

• Cultural Innovations:

  • Borgeet (devotional music).

  • Sattriya classical dance.

  • Ankia Naat and Bhaona theatre traditions.

• Core Values:

  • Humanism, equality, devotion, ethical living.

Subject Analysis:

• Key GS-1 figure linking Bhakti movement with regional culture.

• Illustrates religion as a tool for social reform and cultural integration.

• Frequently asked in prelims and mains for Assam-specific heritage.

GS–2 | GOVERNANCE / HEALTH DIPLOMACY

3. Scheme for Promotion of International Cooperation for AYUSH

Subtopic: Soft Power, Health Diplomacy & Export Promotion

Value Addition:

• Nature: Central Sector Scheme.

• Nodal Ministry: Ministry of AYUSH.

• Core Objective:

  • Promote global acceptance and exports of AYUSH products and services.

• Systems Covered:

  • Ayurveda, Yoga, Naturopathy, Unani, Siddha, Sowa-Rigpa, Homoeopathy.

• Global Outreach:

  • Enhances awareness and institutional presence of AYUSH worldwide.

• Stakeholder Support:

  • Assistance to drug manufacturers, hospitals, institutions, entrepreneurs.

• Key Components:

  1. International Exchange: Experts and officers.

  2. Incentives: Participation in exhibitions, trade fairs, roadshows.

  3. Market Development: Branding and promotional activities abroad.

  4. Institutional Support: AYUSH Information Cells and health centres overseas.

  5. Academic Chairs: AYUSH Chairs in foreign universities.

  6. Fellowships & Scholarships: For foreign students in Indian AYUSH institutes.

Subject Analysis:

• Strengthens India’s soft power and cultural diplomacy.

• Important GS-2 topic linking health governance, exports, and foreign policy.

GS–3 | SCIENCE & TECHNOLOGY

4. Frequency Combs

Subtopic: Precision Measurement, Timekeeping & Advanced Physics

Value Addition:

• Definition:

  • Laser light source producing discrete, evenly spaced frequencies, like a comb.

• Technological Significance:

  • Connects radio-frequency (<100 GHz) with optical frequencies (>200 THz).

• Spectral Property:

  • Emits multiple ultra-stable frequencies instead of a single wavelength.

• Precision:

  • Extremely high accuracy and long-term stability.

• Measurement Capability:

  • Enables exact comparison of unknown light frequencies with reference standards.

• Applications:

  • Atomic clocks calibration.

  • Measuring gravitational time dilation.

  • Exoplanet detection via stellar spectra.

  • High-speed and high-resolution spectroscopy.

Subject Analysis:

• High-value GS-3 topic for advanced instrumentation and fundamental science.

• Demonstrates how physics supports navigation, astronomy, and time standards.

GS–3 | ENVIRONMENT / BIODIVERSITY

5. Parasynnemellisia khasiana

Subtopic: Fungal Diversity, Taxonomy & Western Ghats–NE Biodiversity

Value Addition:

• Discovery Location:

  • Bamboo forests around Mawsynram, Meghalaya.

• Taxonomic Status:

  • Newly identified fungal species.

• Etymology:

  • Named after Khasi Hills.

• Host Association:

  • Found on dead stems of Chimonocalamus griffithianus (thorny bamboo).

• Scientific Process:

  • Morphological + molecular analysis confirmed uniqueness.

• New Genus:

  • Researchers created Parasynnemellisia genus.

  • P. khasiana is the type species.

• Evolutionary Significance:

  • Represents a distinct lineage in Phaeosphaeriaceae family.

Subject Analysis:

• Highlights India’s undocumented microbial biodiversity.

• Important for GS-3 topics on taxonomy, conservation, and ecosystem studies.

FACTS FOR PRELIMS | SPORTS

6. World Rapid Chess Championship, 2025

Subtopic: International Sports Governance

Value Addition:

• Governing Body:

  • FIDE (International Chess Federation).

  • Headquarters: Lausanne, Switzerland.

• Indian Achievements:

  • Arjun Erigaisi won bronze (first at this level).

  • Koneru Humpy also won bronze.

• Historic Milestone:

  • Arjun Erigaisi became the second Indian male after Viswanathan Anand to medal at this level.

• Format:

  • Rapid time-control chess.

Subject Analysis:

• Useful for prelims factual questions on sports bodies and international tournaments.

• Reflects India’s rising stature in elite global chess.