17 January 2026 - Daily Current Affairs Updates

GS–1 | INDIAN GEOGRAPHY / PHYSICAL GEOGRAPHY

1. Zanskar River

Subtopic: Himalayan Rivers, Glacial Geomorphology & Adventure Tourism

Value Addition:

• River System: Major left-bank tributary of the Indus River.

• Location: Flows entirely within Ladakh (UT), draining the remote Zanskar Valley in the north-western Himalayas.

• Origin & Course:

  • Formed by two main branches:

    • Doda River (origin near Pansi-La Pass).

    • Kargyag River (origin near Shingo La) + Tsarap River (origin near Baralacha La).

  • Flows north-westward and joins the Indus at Nimmu (~3,100 m elevation).

• Geomorphological Features:

  • Carves the deep and spectacular Zanskar Gorge.

  • Catchment shaped extensively by glacial erosion.

  • Displays classic U-shaped valleys and hanging valleys, indicating past glaciation.

• Tourism Significance:

  • Summer: River rafting between Chilling and Nimmu.

  • Winter: Freezing of river enables the iconic Chadar Trek.

• Climate Change Angle:

  • Insufficient ice formation leading to postponement of Chadar trek highlights warming impacts on cryospheric systems.

Subject Analysis:

• High-yield GS-1 topic linking glacial geomorphology, Himalayan rivers, and climate vulnerability.

• Frequently asked for river–tributary mapping and physical geography features.

GS–2 | SOCIAL JUSTICE / FINANCIAL INCLUSION

2. NPS Vatsalya Scheme

Subtopic: Pension Reforms, Child-Centric Financial Security

Value Addition:

• Regulatory Authority: Pension Fund Regulatory and Development Authority (PFRDA).

• Nature of Scheme:

  • Contributory, long-term pension savings scheme designed exclusively for minors.

  • Aims to inculcate early savings habit and ensure future financial stability.

• Eligibility:

  • All Indian citizens below 18 years.

  • NRIs and OCIs also eligible.

• Account Operation:

  • Account opened in the minor’s name.

  • Operated by parent or legal guardian till majority.

• Contribution Rules:

  • Minimum initial contribution: ₹250.

  • Minimum annual contribution: ₹250.

  • No upper contribution limit.

  • Contributions allowed as gifts from relatives/friends.

• Pension Fund Choice:

  • Guardian can choose any PFRDA-registered pension fund.

• Partial Withdrawal:

  • Allowed after 3 years from account opening.

  • Up to 25% of own contribution (excluding returns).

  • Permitted for education, medical needs, notified disabilities.

  • Max 2 withdrawals before 18, and 2 more between 18–21 years.

• Recent Governance Step:

  • Formation of a 15-member high-level committee (headed by M. S. Sahoo) to design assured payout frameworks, as per PFRDA Act.

Subject Analysis:

• Important GS-2 topic on pension reforms, demographic transition, and social security deepening.

• Useful for mains on financial inclusion beyond working-age population.

GS–3 | ENVIRONMENT / DISASTER MANAGEMENT

3. Valley of Flowers National Park

Subtopic: Alpine Ecosystems, Forest Fires & Biodiversity

Value Addition:

• Location: Chamoli district, Uttarakhand.

• Area: ~87 sq km.

• Discovery: Accidentally discovered in 1931 by Frank S. Smythe and team.

• Conservation Status:

  • UNESCO World Heritage Site.

  • One of the two core zones of the Nanda Devi Biosphere Reserve (other: Nanda Devi NP).

• Geographical Setting:

  • Gentle alpine valley contrasting with the rugged terrain of Nanda Devi NP.

  • Represents an ecological transition zone between Zanskar and Great Himalayan ranges.

  • Snow-covered for most of the year.

• Floral Diversity:

  • Over 600 species of alpine flowers.

  • Includes orchids, primulas, poppies, anemones, daisies, marigolds.

  • Rich repository of medicinal plants.

• Faunal Diversity:

  • Gray langur, flying squirrel, Himalayan weasel, black bear, red fox, snow leopard.

  • Insects like the lime butterfly.

• Current Issue:

  • Forest fire requiring IAF assistance, highlighting vulnerability of alpine ecosystems.

Subject Analysis:

• High-value GS-3 topic linking biodiversity conservation, forest fires, and climate-induced risks.

• Frequently used for protected area–species–threat mapping.

GS–3 | SCIENCE & TECHNOLOGY / BIOLOGY

4. Drosophila melanogaster

Subtopic: Model Organisms, Stem Cell Research

Value Addition:

• Commonly known as the fruit fly.

• Native to tropical Old World, now globally distributed.

• Habitat & Diet:

  • Thrives in human-modified environments.

  • Feeds on rotting and fermenting plant matter.

• Life Cycle:

  • Undergoes complete metamorphosis.

  • Rapid reproduction; one pair can produce hundreds of offspring.

  • Sexual maturity achieved in ~1 week.

• Biological Features:

  • Chitinous exoskeleton.

  • Three body segments and three pairs of legs.

  • Highly light-sensitive eyes.

  • Clear sexual dimorphism.

• Scientific Importance:

  • Widely used model organism in genetics, developmental biology, neuroscience.

  • Recent research on ovarian stem cells helps understand ageing and reproductive longevity.

Subject Analysis:

• GS-3 topic linking basic biology with cutting-edge biomedical research.

• Frequently asked for model organism identification and applications.

GS–3 | ASTRONOMY / ASTROPHYSICS

5. White Dwarf

Subtopic: Stellar Evolution & Degeneracy Pressure

Value Addition:

• Definition: Dense stellar remnant left after a Sun-like star exhausts nuclear fuel and sheds outer layers as a planetary nebula.

• Size & Mass:

  • Mass ~half of the Sun.

  • Size comparable to Earth.

• Physical Properties:

  • No active nuclear fusion.

  • Remains extremely hot initially and cools over billions of years.

• Internal Structure:

  • Composed mainly of helium, carbon, oxygen nuclei.

  • Supported against collapse by electron degeneracy pressure, not thermal pressure.

• Evolutionary End-State:

  • Gradual cooling may lead to black dwarfs in the far future (none exist yet).

• Astronomical Utility:

  • Predictable cooling allows estimation of ages of star clusters and galaxies.

• Recent Observation:

  • Detection of a white dwarf producing a colourful shockwave, aiding study of stellar motion through interstellar medium.

Subject Analysis:

• High-quality GS-3 topic on stellar life cycles and fundamental astrophysics concepts.

GS–3 | ECONOMY / TRADE & FEDERALISM

6. Export Preparedness Index (EPI) 2024

Subtopic: Sub-National Trade Competitiveness

Value Addition:

• Released by NITI Aayog.

• Objective: Assess export readiness of States and UTs, recognising their role in India’s trade growth.

• Edition: Fourth edition (first released in 2020).

• Framework:

  • 4 pillars, 13 sub-pillars, 70 indicators.

• Pillars & Weightage:

  • Business ecosystem – 40%.

  • Export infrastructure – 20%.

  • Policy & governance – 20%.

  • Export performance – 20%.

• State Categorisation:

  • Large States.

  • Small States & UTs.

  • North-Eastern States.

• Top Performers:

  • Large States: Maharashtra, Tamil Nadu, Gujarat, UP, Andhra Pradesh.

  • Small/NE/UTs: Uttarakhand, J&K, Nagaland, DNHD & Daman-Diu, Goa.

Subject Analysis:

• Key GS-3 topic on competitive federalism, export-led growth, and regional disparities.

GS–3 | HEALTH / GENETICS

7. Huntington’s Disease

Subtopic: Neurodegenerative Disorders & Genetic Inheritance

Value Addition:

• Rare inherited neurological disorder.

• Affects basal ganglia and cerebral cortex.

• Cause: Mutation in HTT gene, producing abnormal huntingtin protein.

• Inheritance Pattern:

  • Autosomal dominant.

  • 50% inheritance risk if one parent affected.

• Types:

  • Adult-onset (most common, >30 years).

  • Juvenile-onset (<20 years, rare).

• Symptoms:

  • Chorea (involuntary dance-like movements).

  • Cognitive decline, emotional and personality changes.

  • Abnormal eye movements, tremors.

• Progression:

  • Gradual worsening; constant care needed.

  • Life expectancy: 15–20 years post onset.

• Treatment:

  • No cure; current focus on symptom management.

  • Recent research offers hope for future disease-modifying therapies.

Subject Analysis:

• GS-3 topic linking genetics, neuroscience, and public health challenges.

FACTS FOR PRELIMS

8. Henley Passport Index 2026

Subtopic: Global Mobility & Soft Power

Value Addition:

• Ranks passports by visa-free/visa-on-arrival access.

• Uses data from International Air Transport Association (IATA).

• Evaluates 199 passports across 227 destinations.

• Top Performers:

  • 1st: Singapore.

  • 2nd: Japan, South Korea.

• India: Improved to 80th rank (up five places).

• Lowest Rank: Afghanistan (101st).

Subject Analysis:

• Useful prelims fact for global indices and international relations context.