19 January 2026 - Daily Current Affairs updates

GS–1 | WORLD PHYSICAL GEOGRAPHY

1. Finke River (Australia)

Subtopic: Ancient River Systems, Arid-Zone Hydrology

Value Addition:

• Indigenous Name: Larapinta, as known to the Arrernte people.

• Location: Central Australia; flows mainly through the Northern Territory, extending towards South Australia.

• Origin & Course:

  • Originates in the MacDonnell Ranges.

  • Formed by the confluence of Davenport Creek and Ormiston Creek.

  • Flows ~600 km southwards towards the Simpson Desert.

• Geological Significance:

  • Regarded as the world’s oldest river system.

  • Geological evidence suggests origin in the Devonian (419–359 mya) or Carboniferous (359–299 mya) periods.

• Hydrology:

  • Intermittent river; appears as disconnected waterholes for most of the year.

  • After heavy rainfall, becomes a fast-flowing river.

  • During major floods, may reach Lake Eyre via the Macumba River.

• Tributaries: Ellery Creek, Palmer River, Hugh River.

Subject Analysis:

• High-yield GS-1 example for river evolution, arid geomorphology, and ancient landscapes.

• Useful for prelims on intermittent rivers and desert hydrology.

GS–1 | PHYSICAL GEOGRAPHY / LIMNOLOGY

2. Lake Natron (Tanzania)

Subtopic: Rift Valley Lakes, Extreme Environments

Value Addition:

• Location: Arusha region, northern Tanzania, near the Kenya border.

• Situated within the Gregory Rift, eastern arm of the East African Rift System.

• International Status: Declared a Ramsar Site in 2001.

• Hydrology:

  • Main inflow: Ewaso Ng’iro River (originates in Kenya).

  • Dimensions: ~57 km long, 22 km wide.

• Chemical Characteristics:

  • Endorheic lake (no outlet).

  • High evaporation → accumulation of natron and trona.

  • Extremely alkaline, among the most chemically hostile lakes globally.

• Red Colouration:

  • Caused by alkalinity-loving algae, especially spirulina with red pigments.

• Ecological Importance:

  • One of the most important breeding grounds for lesser and greater flamingos in East Africa.

  • Harsh chemistry limits predators, providing a safe habitat for flamingos.

• Nearby Feature: Extinct Gelai Volcano (~2,942 m) to the southeast.

Subject Analysis:

• Important GS-1 case for chemical lakes, rift valley geomorphology, and unique ecosystems.

• Frequently used for prelims on extreme habitats and adaptive biodiversity.

GS–3 | LAND GOVERNANCE & AGRICULTURE

3. Jamma Bane Lands (Karnataka)

Subtopic: Traditional Land Tenure, Revenue Reforms

Value Addition:

• Meaning: “Jamma” denotes hereditary ownership.

• Regional Specificity: Unique landholding system of Kodagu (Coorg) district, Karnataka.

• Historical Background:

  • Granted by rulers of Coorg and later the British (1600–1800).

  • Rewards for military service to local communities.

• Land Composition:

  • Wetlands: Traditionally used for paddy cultivation.

  • Forested uplands: Gradually converted into coffee plantations.

• Legal Evolution:

  • Governed by Coorg Land Revenue & Regulations Act, 1899.

  • Replaced by Karnataka Land Revenue Act, 1964.

• Recent Update:

  • Karnataka amended land revenue laws to modernise records and clarify tenure rights.

Subject Analysis:

• GS-3 topic linking agrarian history, land reforms, and plantation economy.

• Useful for mains on customary land systems and legal transitions.

GS–3 | DEFENCE TECHNOLOGY

4. RBS-15 Missile

Subtopic: Anti-Ship Missiles, Air-Surface Warfare

Value Addition:

• Developer: Saab Bofors Dynamics (Sweden).

• Type: Fire-and-forget missile; surface-to-surface and air-to-surface.

• Primary Role: Anti-ship; also capable of land-attack missions.

• Physical Specifications:

  • Length: 4.35 m | Diameter: 0.5 m | Wingspan: 1.4 m.

  • Launch weight: ~800 kg.

• Performance:

  • Range: Up to 200 km.

  • Speed: Subsonic (Mach ~0.9).

• Warhead:

  • 200-kg high-explosive, blast-fragmentation type.

• Guidance & Survivability:

  • Inertial navigation + GPS + Ku-band radar seeker.

  • Low radar and infrared signature.

  • Highly resistant to electronic countermeasures.

• Operational Edge:

  • Sea-skimming profile with evasive manoeuvres.

  • Advanced mission-planning system.

Subject Analysis:

• High-value GS-3 topic on modern naval warfare and missile technology.

• Useful for prelims on missile features and defence innovations.

GS–3 | BIODIVERSITY & PUBLIC HEALTH

5. Pufferfish

Subtopic: Toxic Fauna, Marine & Freshwater Biodiversity

Value Addition:

• Taxonomy: Order Tetraodontiformes.

• Common Names: Toadfish, balloonfish, patkafish, fugu.

• Habitat in India:

  • Western Ghats.

  • River basins: Ganga, Brahmaputra, Mahanadi.

• Ecological Role:

  • Many freshwater species are endemic and act as river health indicators.

• Biological Defence:

  • Can inflate body into a spherical shape when threatened.

• Diversity:

  • India hosts 8 genera and ~32 species.

• Conservation Status:

  • Indian species generally classified as Vulnerable (IUCN).

• Poisoning Aspect:

  • Some species contain tetrodotoxin, a potent neurotoxin.

  • Blocks sodium channels → paralysis and respiratory failure.

  • Heat-stable; cooking does not neutralise it.

  • Toxin originates from symbiotic/ingested bacteria, not the fish itself.

• Recent Significance:

  • First confirmed case of pufferfish poisoning in India.

Subject Analysis:

• GS-3 topic linking biodiversity, food safety, and toxicology.

• Useful for prelims on venomous organisms and bio-toxins.

GS–2 | INTERNATIONAL LAW & OCEAN GOVERNANCE

6. Biodiversity Beyond National Jurisdiction (BBNJ) Treaty

Subtopic: High Seas Governance, Marine Conservation

Value Addition:

• High Seas Defined:

  • Ocean areas beyond 200 nautical miles (EEZ limits).

  • Cover ~two-thirds of oceans and ~half of Earth’s surface.

• Background:

  • Earlier governed mainly by general principles under United Nations Convention on the Law of the Sea.

• Adoption:

  • Adopted in 2023 under UN-led intergovernmental negotiations.

• Legal Status:

  • Third implementing agreement under UNCLOS.

  • Earlier ones:

    • 1994 Deep Seabed Mining Agreement.

    • 1995 UN Fish Stocks Agreement.

• Objectives:

  • Create a legally binding framework for conserving high-seas biodiversity.

  • Enable Marine Protected Areas in international waters.

  • Mandate Environmental Impact Assessments for harmful activities.

• Institutions:

  • Conference of Parties (CoP).

  • Clearing-House Mechanism for data sharing.

  • Dedicated Secretariat and funding mechanism.

• Global Goal: Supports 30×30 ocean protection target.

• Membership:

  • 83 ratifications so far.

  • India has signed but not ratified.

Subject Analysis:

• High-probability GS-2 topic on global commons and multilateral environmental governance.

• Useful for mains on India’s role in ocean sustainability.

GS–3 | AGRICULTURE & ANIMAL HUSBANDRY

7. Vrindavani and Karan Fries Cattle Breeds

Subtopic: Synthetic Breeds, Dairy Productivity

Value Addition:

Karan Fries:

• Developed at National Dairy Research Institute, Karnal.

• Cross of Tharparkar × Holstein-Friesian.

• Milk yield: >3,500 kg per 10-month lactation.

• Peak daily yield: ~46.5 kg.

• Combines high productivity with resilience.

Vrindavani:

• Developed at ICAR–Indian Veterinary Research Institute, Bareilly.

• Cross of Hariana × Holstein-Friesian × Brown Swiss × Jersey.

• Designed for higher milk yield with climatic adaptability.

Recent Development:

• Both breeds officially registered, recognising India’s progress in genetic up-gradation.

Subject Analysis:

• GS-3 topic linking animal genetics, food security, and dairy economy.

• Useful for mains on productivity enhancement in livestock sector.

GS–3 | SPACE SCIENCE

8. Voyager-1 Space Probe

Subtopic: Deep Space Exploration, Interstellar Science

Value Addition:

• Launched: 1977 by NASA.

• Primary Mission: Exploration of outer planets.

• Key Flybys: Jupiter and Saturn; studied rings, moons, magnetic fields.

• Historic Achievements:

  • First spacecraft to enter interstellar space (August 2012).

  • Most distant human-made object from Earth.

  • Discovered Jupiter’s thin ring, moons Thebe and Metis.

  • Discovered five new moons of Saturn and the G-ring.

• Scientific Instruments:

  • Cosmic Ray Subsystem.

  • Plasma Wave Subsystem.

  • Infrared Interferometer Spectrometer and Radiometer (IRIS).

• Current Milestone:

  • Expected to reach a distance equivalent to one light-day from Earth.

Subject Analysis:

• High-value GS-3 topic on space exploration milestones and interstellar science.

• Useful for prelims on space probes and scientific instruments.