UPSC ruthiyai

28/03/2026

26/03/2026

🔆 Cauvery River

📍 In News: An IIT Gandhinagar study predicts about 3.5% decline in Cauvery river flow (2026–2050) due to climate variability and rising temperatures.

📍 About Cauvery River

✅ Origin: Talakaveri (Coorg, Karnataka) in the Brahmagiri Hills of the Western Ghats.

✅ Length: Approximately 800 km.

✅ Drainage Basin: Extends across Karnataka, Tamil Nadu, Kerala and UT of Puducherry, covering about 2.7% of India’s geographical area.

📍 Tributaries

➡️ Left Bank: Harangi, Hemavati, Shimsha, Arkavati.

➡️ Right Bank: Lakshmantirtha, Kabini, Suvarnavati, Bhavani, Noyyal, Amaravati.

📍 Major Waterfalls
✅ Shivanasamudra Falls
✅ Hogenakkal Falls

📍 Major Dams
✅ Krishnarajasagar (Karnataka)
✅ Mettur Dam (Tamil Nadu)

📍 Significance
➡️ Lifeline river for irrigation, drinking water and hydropower in southern India.
➡️ Central to inter-state water disputes and river basin management debates.

25/03/2026

UPSC cutoff marks

25/03/2026

🔆 Vishwakarma Cave (Barabar Hills)

📍 Location & Period
✅ Located in Barabar Hills, Jehanabad district, Bihar
✅ Dates to Mauryan period (3rd century BCE)

📍 Other Name
✅ Also known as Vishwamitra Cave

📍 Architectural Features
✅ Comprises two rectangular chambers
✅ Front chamber is open like an extended porch/verandah
✅ Rock-cut from solid granite with characteristic Mauryan polish

📍 Access
✅ Approach through the famous “Ashoka Steps” carved into the cliff

📍 Historical Significance
✅ Emperor Ashoka dedicated the cave to the Ajivika sect in the 12th year of his reign (~260 BCE)
✅ Only cave in the Barabar group without inscriptions from the post-Ashokan period
✅ Later, Ashoka also dedicated the nearby Karan Chaupar Cave

📍 Importance
➡️ Among the earliest examples of Indian rock-cut architecture
➡️ Reflects state patronage of heterodox sects (Ajivikas) during Mauryan rule



upsc_art_and_culture

23/03/2026

CSAT

22/03/2026

The Ellora Caves represent a significant synthesis of three major Indian religions: Buddhism, Hinduism, and Jainism. Located in Maharashtra, India, the 34 monumental rock-cut caves feature 12 Buddhist (caves 1–12), 17 Hindu (caves 13–29), and 5 Jain (caves 30–34) structures, demonstrating historical religious harmony.

Religious Coexistence: The caves were constructed between the 6th and 10th centuries CE, featuring temples and monasteries from all three faiths in close proximity.
Kailasha Temple (Cave 16): The most famous monument is a magnificent monolithic Hindu structure dedicated to Lord Shiva.
Unique Artistry: The caves are renowned for their intricate sculptures, such as the Dashavatara (Cave 15) and various Jain shrines, showcasing the high artistic achievements of the Rashtrakuta and Yadav dynasties.

21/03/2026

🔆 Critical Mineral Recycling Incentive Scheme (CMRIS)

📍 Launched by: Ministry of Mines
📍 Under: National Critical Minerals Mission (NCMM)
📍 Type: Central Sector Scheme
📍 Tenure: FY 2025–26 to FY 2030–31
📍 Outlay: ₹1,500 crore

📍 Key Objectives

✅ Promote recycling of critical minerals from secondary sources (e-waste, spent lithium-ion batteries, catalytic converters).
✅ Establish a secondary domestic supply chain to reduce import dependence.
✅ Target: 270 kilotons recycling capacity & 40 kilotons recovered minerals annually by FY 2031.

📍 Incentive Structure

✅ Incentives on Capex & Opex (reimbursement basis).
✅ Covers all recycling stages — collection → processing → extraction → purification.

📍 Beneficiary Classification

1️⃣ Group A – Large Recyclers:
• Revenue > ₹200 crore
• Investment ≥ ₹100 crore
• Capacity ≥ 10,000 tonnes
• Incentive Cap: ₹50 crore

2️⃣ Group B – Startups/Smaller Recyclers:
• Revenue < ₹200 crore
• Investment ≥ ₹25 crore
• Capacity ≥ 5,000 tonnes
• Incentive Cap: ₹25 crore
🟩 1/3rd of total outlay reserved for Group B startups.

📍 Feedstock Sources

E-waste, lithium-ion batteries, catalytic converters, secondary metal waste.
(Black-mass producers not eligible.)

📍 National Critical Minerals Mission (NCMM)

✅ Promote R&D in advanced mineral processing & recovery.
✅ Develop Centres of Excellence and mineral processing parks.
✅ Build national stockpile for supply security.
✅ Encourage domestic & global investments in mining and recycling.
✅ ₹16,300 crore govt. funding + ₹18,000 crore PSU/private investment.

📍 Critical Minerals Covered

🔹 Lithium, Cobalt – EV batteries, electronics
🔹 Graphite, Nickel – Alloys, battery storage
🔹 Rare Earth Elements (REEs) – Defence, high-tech
🔹 Titanium, Tungsten – Aerospace
🔹 Vanadium, Molybdenum – Steel & energy

📍 Technological & Policy Support

✅ MMDR Act (1957) – 2023 Amendments: Enable faster exploration & approvals.
✅ GSI: 368 exploration projects underway.
✅ S&T PRISM Program: Supports startups/MSMEs in mineral R&D.
✅ KABIL (JV under MoM): Secured lithium mining rights in argentina.

21/03/2026

🔆 Molecular Clouds

📍 Why in News
✅ Scientists have traced small molecular clouds near the Milky Way disc and observed the magnetic field “skeleton” around them for the first time.
✅ This helps understand the role of magnetic fields in star formation.

📍 What are Molecular Clouds?
✅ Dense interstellar clouds made of gas and dust where molecules can form.
✅ The most abundant molecule is molecular hydrogen (H₂).
✅ They are also called stellar nurseries because new stars are born inside them.

📍 Formation of Stars
✅ Stars form when parts of a molecular cloud collapse under gravity.
✅ This collapse can be triggered by external disturbances such as shock waves from nearby supernova explosions.
✅ Our Sun is believed to have formed in a similar molecular cloud.

📍 Key Features
✅ Opaque / Dark Appearance: Dust grains absorb and scatter visible light → appear as dark nebulae.
✅ Irregular Shape: They lack clear outer boundaries and show complex filamentary structures.
✅ Cold Regions: Temperatures are typically very low (~10–20 K) enabling molecule formation.
✅ Magnetic Fields: Help regulate cloud collapse, fragmentation, and star-formation rate.

📍 Significance in Astronomy
✅ Help scientists study origin of stars and planetary systems.
✅ Provide clues about galactic structure and evolution.
✅ Important for understanding distribution of matter in the Milky Way.






y

21/03/2026

Article 15 of the Indian Constitution prohibits discrimination against citizens on grounds solely of religion, race, caste, s*x, or place of birth. It ensures equality and prevents discrimination in access to public places (such as hotels and wells) and in general societal interactions

20/03/2026

🔆 Ports of Ancient India

📍 Lothal Port (Gujarat)
✅ Oldest known port in India (Indus Valley Civilization)
✅ Excavated by ASI (1954) → Dockyard, marketplace, township discovered
✅ Evidence of maritime trade & urban planning

📍 Muziris Port (Kerala)
✅ Major Indo-Roman trade centre
✅ Exported spices (pepper), ivory, pearls, semi-precious stones
✅ Imports included wine, gold coins, textiles, wheat

📍 Poompuhar / Kaveripattinam (Tamil Nadu)
✅ Chola port town at mouth of River Kaveri
✅ Trade with Asian regions & Arab merchants
✅ Famous for spice trade

📍 Arikamedu (Puducherry)
✅ Known as Podouke in classical texts
✅ Bead-making & Indo-Roman trade hub
✅ Sangam literature references

📍 Bharuch / Barygaza (Gujarat)
✅ Located at mouth of River Narmada
✅ Trade with Greeks, Romans, Arabs, Africans, Chinese
✅ Important trans-shipment centre using monsoon winds

📍 Sopara / Śūrpāraka (Maharashtra)
✅ Capital of Aparanta region
✅ Trade links with Mesopotamia, Egypt, Arabia, East Africa
✅ Ashokan edict fragments & relics found

📍 Calicut / Kozhikode (Kerala)
✅ Major medieval spice trade port (pepper, cloves, cinnamon)
✅ Flourished under Chera rule
✅ Imports: Chinese ceramics, European goods

📍 Tuticorin / Thoothukudi (Tamil Nadu)
✅ Important seaport of Pandya & Chola dynasties
✅ Famous for pearl fishery & maritime trade

📍 Other Important Ancient Ports (Quick Facts)
✅ Nirppeyarru (Mahabalipuram) – Tamil Nadu
✅ Tondi & Korkai – Key Pandya ports
✅ Motupalli – Port of Kakatiya dynasty (Andhra Pradesh)
✅ Machilipatnam (Masula/Bandar) – Flourished in Satavahana period, famous for muslin trade
✅ Tamralipti (West Bengal) – Major eastern trade gateway, mentioned by Ptolemy & Xuanzang
✅ Pulicat – Important during Vijayanagara rule
✅ Barbaricum (near Karachi) – Key Indus delta port for Indo-Roman trade



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