In News:

• In a major advancement for oncological care, Swiss pharmaceutical company Roche has launched India’s first under-the-skin (subcutaneous) immunotherapy drug, Tecentriq SC (atezolizumab).
• Approved by the Central Drugs Standard Control Organisation (CDSCO), this formulation marks a significant departure from traditional intravenous (IV) cancer treatments.
• Given that lung cancer is among the most prevalent malignancies in India—with approximately 80,000 to 81,000 new cases diagnosed annually, frequently at advanced stages—this clinical innovation is poised to reshape cancer management frameworks.

Mechanism of Action: Re-engineering Immunotherapy

Tecentriq SC functions by targeting and blocking the Programmed Death-Ligand 1 (PD-L1) protein. Cancer cells often express PD-L1 to suppress the host immune response and evade detection by T-cells. By inhibiting this specific interaction, atezolizumab removes the biochemical "off-signal," effectively allowing the body's native immune system to identify, target, and dismantle tumor cells.

To achieve rapid delivery under the skin, Tecentriq SC integrates Halozyme Therapeutics' Enhanze drug delivery technology. This process utilizes recombinant human hyaluronidase PH20 (rHuPH20), an enzyme that temporarily enhances permeability in the subcutaneous tissue, enabling the medication to disperse rapidly into the bloodstream.

Clinical Efficacy, Suitability, and Medical Advantages

The drug is indicated for the treatment of adult patients presenting with:

• Adjuvant Non-Small Cell Lung Cancer (NSCLC) (early-stage post-surgical treatment)
• Metastatic NSCLC (advanced-stage, spreading cancer)

As NSCLC accounts for nearly 80% to 85% of all lung cancer occurrences in India, the therapeutic scope of this innovation is broad. However, treatment suitability requires precise diagnostics. Patients must display high levels of PD-L1 expression on their tumor cells, making approximately half of the diagnosed NSCLC cohort eligible for this targeted, and occasionally chemotherapy-free, monotherapy.

Medical benefits include:

• Drastic Time Reduction: Administration drops from several hours of IV infusion to a localized injection (typically in the thigh) lasting roughly 7 minutes, reducing treatment time by approximately 80%.
• Enhanced Patient Well-being: Subcutaneous administration eliminates the physical distress and pain of finding viable veins in frail individuals. Shorter clinic stays also alleviate travel fatigue and emotional stress for both patients and caregivers.
• Improved Compliance: Streamlined administration enhances adherence to treatment schedules, crucial for positive long-term clinical outcomes.

Socio-Economic Realities and Health Economics

While clinically transformative, the introduction of Tecentriq SC highlights the persistent challenge of affordability in tertiary healthcare.

• Financial Implications: The maximum retail price is set at ?3.7 lakh per vial/dose. With a standard treatment regimen requiring roughly six cycles administered every 21 days, the cumulative expenditure poses a heavy financial burden on the average Indian family.
• Mitigation and Access Pathways: To alleviate this financial strain, Roche has introduced a patient assistance mechanism called the "Blue Tree" program, which offers financial support and Equated Monthly Instalment (EMI) options. Crucially, the drug has been integrated into the Central Government Health Scheme (CGHS), providing substantial relief to eligible public sector beneficiaries. Furthermore, medical experts point out that despite a slightly higher baseline cost for the subcutaneous drug formulation over its IV counterpart, the overall economic impact balances out by eliminating hospital bed charges, prolonged day-care monitoring fees, and ancillary costs.

Significance for India's Healthcare Infrastructure

For a developing nation grappling with an escalating non-communicable disease (NCD) burden, the deployment of subcutaneous immunotherapy has profound systemic implications:

• Optimization of Healthcare Resources: Because Tecentriq SC can be safely administered by trained nursing staff in outpatient departments, one infusion station can treat up to five patients in the time previously occupied by a single IV recipient. This dramatically increases patient throughput.
• Decentralization of Oncology Care: By mitigating the need for specialized, complex intravenous infrastructure, this model facilitates the shift of cancer care from overburdened tertiary hospitals in metropolitan zones to localized daycare centers, advancing the objective of equitable healthcare distribution.

In News:

Northwest India is currently experiencing a temporary cessation of rainfall and thunderstorms as the most recent Western Disturbance (WD) weakens and shifts eastward. However, satellite imagery indicates that this respite may be short-lived, as new systems continue to develop, highlighting the persistent role these extratropical storms play in the Indian meteorological cycle.

Defining Western Disturbances

Western Disturbances are extratropical storm systems that originate in the Mediterranean region. Unlike the tropical cyclones that form in the Bay of Bengal or the Arabian Sea, WDs are non-tropical in nature and are driven by the Subtropical Westerly Jet Stream. These systems carry moisture-laden air from the Mediterranean Sea, and occasionally from the Caspian and Black Seas, traveling thousands of kilometers eastward across West and Central Asia to reach the Indian subcontinent.

The Etymology: Why "Western Disturbance"?

The nomenclature is derived directly from the system’s trajectory and meteorological impact:

• Western: Refers to the direction of origin (the Mediterranean region, west of India).
• Disturbance: In meteorological terms, this denotes an area of "disturbed" or reduced air pressure, which typically leads to unstable weather conditions, cloud cover, and precipitation.

Seasonal Impact and Geographic Reach

While WDs can occur year-round, they are most influential during the winter months (November to March) and early pre-monsoon season. Their reach extends across a vast geographic belt including Pakistan, North and Northwest India, Nepal, and Bangladesh.

In India, the primary beneficiaries and victims are the Himalayan states (which receive heavy snowfall) and the plains of Punjab, Haryana, Rajasthan, and Delhi (which receive winter rains).

The Economic and Agricultural Significance

For the Indian economy, particularly the agricultural sector, Western Disturbances are a double-edged sword:

• The Rabi Crop Vitality: The winter rain brought by these systems is crucial for the Rabi season. It provides the necessary moisture for crops like wheat, gram, and mustard. In the absence of WDs, Northwest India often faces "dry winters," leading to lower agricultural yields.
• Water Security: The heavy snowfall in the Himalayas serves as a frozen reservoir. As this snow melts during the summer, it feeds perennial rivers like the Ganga, Indus, and Yamuna, ensuring water availability for irrigation and hydropower.
• The Downside: Intense WDs can cause "disturbances" in the literal sense—triggering flash floods, landslides in the hills, and hailstorms in the plains that can severely damage standing crops just before harvest.

Climatological Interaction: The Subtropical Jet Stream

The intensity of a Western Disturbance is closely linked to the position and strength of the Subtropical Westerly Jet Stream. During winter, this jet stream shifts southward over the Indian subcontinent. When a WD embeds itself within this high-altitude wind current, it gains the momentum necessary to cross the high altitudes of the Hindu Kush and the Himalayas, bringing sudden weather shifts to the northern plains.

In News:

In a significant breakthrough for Indian herpetology, scientists have discovered a rare species of fanged frog, Limnonectes motijheel, within the pristine ecosystems of the Namdapha Tiger Reserve in Arunachal Pradesh. This discovery underscores the immense, yet often hidden, biodiversity of the Eastern Himalayas and provides new insights into the evolution of amphibian breeding behaviors.

The Anatomy and Behavior of Limnonectes motijheel

The newly identified species belongs to the genus Limnonectes, a group of amphibians spread across South and Southeast Asia. With this addition, the number of known Limnonectes species in India has risen to six.

Key Biological Features:

• The "Fangs": The frog is characterized by small, bony, fang-like projections in the lower jaw of the males. These are not true teeth but are believed to be used for territorial combat or as an aid in feeding.
• Physical Appearance: It possesses a distinct dark-brown line between the eyes, an inverted "V"-shaped ridge on its back, and broken longitudinal folds along its flanks.
• Dimensions: As a medium-sized amphibian, adults typically measure between 2.3 to 3.5 centimeters.
• Naming: The species is named after Motijheel, a site within Namdapha renowned for its exceptionally high amphibian density and diversity.

Unique Breeding: The Mud-Nester

Perhaps the most striking feature of Limnonectes motijheel is its reproductive strategy. Unlike most frogs that deposit eggs in water bodies or on overhanging foliage, this species constructs a mud nest beneath leaf litter on the forest floor. This specific "house-building" behavior is a unique adaptation for moisture retention and predator avoidance, and it represents the first recorded instance of mud-nesting within this genus in India.

Namdapha Tiger Reserve

The discovery highlights the ecological importance of Namdapha, a National Park and Tiger Reserve located in the Changlang District of Arunachal Pradesh, bordering Myanmar.

Geographic and Ecological Significance:

• Biogeographical Junction: Namdapha sits at the confluence of the Indian Sub-Continent and Indo-China Biogeographic Regions. It is nestled between the Mishmi Hills (Dapha Bum ridge) and the Patkai ranges.
• Hydrology: The reserve is drained by the Namdapha River, a tributary of the Noa-Dihing, which flows through the heart of the park.
• Vegetation Gradient: Due to its vast altitudinal range, the park exhibits a diverse floral spectrum, ranging from Tropical Evergreen and Moist Deciduous forests to Temperate and Alpine Scrub forests.

Biodiversity Highlights:

• The Four Big Cats: Namdapha is the only park in the world that serves as a habitat for four species of big cats: Tiger, Leopard, Snow Leopard, and Clouded Leopard.
• Rare Fauna: It is home to the Hoolock Gibbon (India’s only ape), the Slow Loris, and the Himalayan Sun Bear.
• Endangered Flora: The park hosts the rare Blue Vanda orchid and the medicinal plant Mishimi Teeta (Copti teeta), which is central to the traditional medicine of local tribes.

In News:

In early 2026, the Indian Army achieved a significant milestone in "network-centric warfare" by operationalizing Shaurya Squadrons. These are specialized drone sub-units integrated directly into armoured (tank) regiments. This move follows the successful implementation of Ashni Platoons in infantry battalions, marking a fundamental shift in how the Army conducts ground operations.

What are Shaurya Squadrons?

Shaurya Squadrons are dedicated drone units embedded within the Army’s armoured corps to provide organic aerial capabilities to tank commanders.

• Composition: Each squadron consists of 20 to 30 personnel specialized in drone piloting, data analysis, and counter-drone measures.
• Asset Mix: They operate a diverse fleet including:
  • Surveillance Drones: For real-time reconnaissance beyond the tank crew's line of sight.
  • Swarm Drones: For overwhelming enemy defenses through coordinated mass attacks.
  • First-Person View (FPV) Drones: Highly agile "kamikaze" drones used for precision strikes on enemy hatches, engine decks, or logistics nodes.
  • Loitering Munitions: "Suicide drones" that can hover over a battlefield for extended periods before engaging a target.

The "Sensor-to-Shooter" Revolution

The primary objective of these squadrons is to compress the Sensor-to-Shooter Cycle—the time elapsed between detecting a target (sensor) and neutralizing it (shooter).

• Traditional Model: Identifying a target often required relaying information up the chain of command to artillery or air support, a process taking minutes.
• Shaurya Model: By embedding drones at the unit level, the tank commander can detect and strike a target directly. The Army aims to reduce this cycle from minutes to mere seconds.
• Tactical Advantage: This allows for "Deep Precision Strikes" and protects heavy armour (like the T-90 Bhishma and Arjun Mk1A) from hidden threats like Anti-Tank Guided Missiles (ATGMs).

Comparison: Shaurya Squadrons vs. Ashni Platoons

The Shaurya initiative scales up the "drone-first" philosophy pioneered by Ashni Platoons.

In News:

Mud volcanoes are non-igneous “sedimentary volcanoes” formed in young oil-field regions, where methane and hydrocarbons under compactional stress force mud and gases to the surface.

A recent eruption of a mud volcano in Diglipur, Andaman Islands, has drawn attention to this rare geological phenomenon. Mud volcanoes differ fundamentally from magmatic volcanoes as they do not involve molten lava but are driven by sedimentary and hydrocarbon processes.

What is a Mud Volcano?

Mud volcanoes, also called sedimentary volcanoes or gas-oil volcanoes are surface expressions of subsurface pressure systems associated with hydrocarbon-rich sedimentary basins.

Key Characteristics

• Non-igneous in origin (no magma involved).
• Occur mainly in young oil-field regions with soft, unconsolidated sediments.
• Erupt mud, water, methane and other gases instead of lava.
• Often form cone-shaped structures.
• Can release flames if methane ignites.
• May emit hot mud and steam due to deep compactional heat.

Though different in origin, their eruptive behaviour can resemble magmatic volcanoes in intensity.

Formation Mechanism

Mud volcanoes develop due to:

• Compactional Stress
  • Deep sediment layers experience pressure over time.
  • Methane and hydrocarbons accumulate in porous formations.
• Gas Build-up and Upward Migration
  • Trapped gases mix with mud and water.
  • The pressurized mixture forces its way upward through fractures.
• Surface Eruption
  • Mud and gases erupt, forming a cone.
  • Repeated eruptions may enlarge the structure.

Due to the depth of origin, expelled mud is sometimes warm and accompanied by steam clouds.

Global Distribution

• Around 1,000 mud volcanoes have been identified globally on land and in shallow waters.
• Prominent concentrations occur in:
  • Azerbaijan (Caspian region)
  • Indonesia
  • Mediterranean region
• Many also occur on the ocean floor, forming islands, banks, and altering coastal geomorphology.

Mud Volcanoes in India

In India, mud volcanoes are confined to the Andaman and Nicobar Islands.

Major Locations

• Baratang Island – Known site of India’s mud volcano.
• Diglipur – Recent eruption reported after several years of dormancy.

These eruptions are linked to the tectonically active Andaman subduction zone, where sediment compression and hydrocarbon accumulation occur.

Geological Significance

• Indicator of hydrocarbon-rich sedimentary basins.
• Provide insights into subsurface gas migration and petroleum systems.
• Important for understanding:
  • Methane emissions (climate relevance)
  • Coastal geomorphology changes
  • Seismic and tectonic processes in subduction zones

Differences: Mud Volcano vs Magmatic Volcano

In News:

Astronomers using the James Webb Space Telescope (JWST) have detected a rare supernova in the early universe. The discovery was linked to a distant gamma-ray burst (GRB) that helped scientists trace the explosive death of a massive star dating back to just a few hundred million years after the Big Bang.

What is a Supernova?

A supernova is a powerful and catastrophic explosion marking the end of a star’s life cycle. It is among the most energetic events in the universe.

During a supernova, a star releases an enormous amount of energy in a short time — sometimes emitting more energy in a few seconds than the Sun will produce in its entire lifetime. These explosions can briefly outshine entire galaxies and are visible across vast cosmic distances.

Types of Supernovae

• Type I Supernova: This occurs in a binary star system where a white dwarf star pulls matter from a companion star. When the accumulated mass crosses a critical limit, a runaway nuclear reaction triggers a thermonuclear explosion.
• Type II Supernova: This occurs when a massive star exhausts its nuclear fuel. Without the outward pressure from fusion, gravity causes the core to collapse, leading to a violent explosion known as a core-collapse supernova.

Role of Supernovae in the Universe

Supernovae play a crucial role in cosmic evolution. They are the primary sources of heavy elements such as iron, gold, and uranium, which are later incorporated into new stars, planets, and even living organisms. Thus, they are fundamental to the chemical enrichment of the universe.

How Common are Supernovae?

In a galaxy like the Milky Way, astronomers estimate that about two to three supernovae occur per century. However, since the universe contains billions of galaxies, astronomers observe hundreds of supernovae every year beyond our galaxy.

Significance of the JWST Discovery

The recent observation is particularly important because it captures a supernova from the early universe, only a few hundred million years after the Big Bang. Studying such ancient stellar explosions helps scientists understand:

• The formation of the first generations of stars
• Early chemical enrichment of the universe
• The evolution of galaxies in the cosmic dawn era

The high sensitivity and infrared capabilities of the James Webb Space Telescope make it uniquely suited to observe such distant and ancient cosmic events.

In News:

For the first time, scientists have recorded the sliteye shark (Loxodonmacrorhinus) in the Great Chagos Bank, the world’s largest coral atoll in the Indian Ocean. The discovery underscores the hidden biodiversity of the Chagos Archipelago and its Marine Protected Area (MPA), highlighting the ecological importance of deepwater habitats.

About the Sliteye Shark

The sliteye shark is a small-bodied requiem shark in the family Carcharhinidae and is the only species in the genus Loxodon. Named for its distinctive slit-like eyes, the species is adapted to low-light, deepwater environments, though it can also inhabit clear, shallow seas.

• Scientific Name:Loxodonmacrorhinus
• Size: Up to 95 cm in length
• Features: Slender body, long narrow face, large eyes, short furrows at mouth corners, small teeth with protruding tips, absent or rudimentary ridge between dorsal fins, gray coloration with white belly, dark-edged caudal and first dorsal fins
• Distribution: Tropical waters of the Indian and western Pacific Oceans, including countries such as India, Indonesia, Sri Lanka, Japan, Australia, China, Kenya, South Africa, and others between 34°N and 30°S

Discovery in Chagos

• Researchers observed two sliteye sharks at depths of 23–29 metres, just 11 km apart, using Baited Remote Underwater Video systems in deep seagrass habitats on the southern rim of the Great Chagos Bank. These meadows, first mapped in 2016 using satellite tracking of green turtles, support more than 110 fish species and are now confirmed as important for sliteye sharks as well.

Conservation Concerns

• The sliteye shark is classified as Near Threatened by the IUCN Red List, with populations projected to decline by approximately 30% over the next 15 years due to heavy fishing pressure.
• The Chagos discovery raises critical questions regarding the species’ abundance, habitat use, and conservation needs.
• The study forms part of a project led by Swansea University in collaboration with international partners, funded by the Bertarelli Foundation, with full findings expected in 2026. The results strengthen the case for protecting deepwater seagrass habitats in the Indian Ocean.

In News:

• The Indian government plans to align indicators of the BRAP 2024 index with the World Bank’s B-READY index to enhance business readiness rankings.
• State Involvement: States have been instructed to address gaps identified in the B-READY evaluations to improve their global rankings.
• Indicators Included: The upcoming 2024 BRAP rankings, prepared by the Department for Promotion of Industry and Internal Trade, will incorporate specific indicators from the B-READY index.
• Enterprise Survey Launch: An enterprise survey for the B-READY index in India is set to start in October, with support from the Ministry of Statistics and Programme Implementation.
• Participation Timeline: Although B-READY rankings will commence in 2024, India’s participation will begin in 2026. The initial rankings will cover 54 countries, expanding to 120 in 2025 and 180 in 2026.
• Successor to Previous Rankings: The B-READY index replaces the Ease of Doing Business rankings, which were discontinued in 2021 due to irregularities. It considers a broader range of factors in its assessments.
• Benchmark for Global Institutions: The B-READY framework will serve as a benchmark for global financial institutions and multinational companies to evaluate a country’s regulatory and policy environment.
• Historical Improvement: India improved its Ease of Doing Business ranking from 142 in 2014 to 63 in 2020.
• Technical Understanding: A team of government officials is tasked with understanding the technical aspects of the B-READY index to formulate strategies for improving India’s score.
• Lifecycle Parameters: The new index tracks ten parameters throughout a firm's lifecycle, including business entry, utility services, and labor, focusing on real-world applications rather than just legal changes.
• Recent BRAP Rankings: The BRAP 2022 rankings were recently announced, with Andhra Pradesh and Kerala achieving the top positions.

Why in the News?

Kozhikode, in Kerala, was named the ‘City of Literature’ by the Unesco Creative Cities Network (UCCN), making it the first such city in India.

About India’s First ‘City Of Literature’:

• Kozhikode (Kerala), has achieved global recognition by joining the UNESCO Creative Cities Network.
• It is now known as the 'City of Literature,' making it the first Indian city to receive this prestigious title.
• This recognition was awarded on World Cities Day, (31 October) along with Gwalior, Madhya Pradesh, which was designated a 'City of Music.'
• Prague was the first city to receive the 'City of Literature' title in 2014.

About UNESCO Creative Cities Network:

• The UNESCO Creative Cities Network is a global initiative established by the United Nations Educational, Scientific, and Cultural Organization (UNESCO) to recognize and promote cities that have made significant contributions to the development of creative industries and culture.
• The UNESCO Creative Cities Network now comprises 350 creative cities from over 100 countries.
• These cities represent seven creative fields, including Crafts and Folk Art, Design, Film, Gastronomy, Literature, Media Arts, and Music.
• Participation in the UNESCO Creative Cities Network provides cities with opportunities for international collaboration, knowledge sharing, and the exchange of best practices in creative and cultural endeavours.
• These cities serve as hubs for artistic expression, cultural preservation, and economic growth, making them vital players in the global creative economy.
• Through this network, cities work together to harness the power of culture and creativity to address common challenges and promote sustainable development, ultimately enhancing their status on the global stage.