Updated list of 28 Indian states and 8 union territories with capitals (2026), largest and smallest states, newest changes and easy tips to remember them.

List of major rivers of India with origin, length and states: Ganga, Yamuna, Brahmaputra, Godavari, Krishna, Narmada and more, plus Himalayan vs peninsular rivers.

Climate change explained simply: the greenhouse effect, causes, effects on India's monsoon, heatwaves and coasts, net zero by 2070, and practical actions you can take.

How do magnets work? Magnetic poles and fields, why some metals stick, electromagnets, Earth's magnetism and uses from MRI to metro trains, explained simply.

Electricity made simple: what current, voltage and resistance are, Ohm's law with examples, AC vs DC, how electricity bill units work, and safety tips.

The human digestive system explained step by step: mouth to large intestine, enzymes and their jobs, how long digestion takes and simple tips for healthy digestion.

Newton's three laws of motion explained simply with everyday Indian examples: inertia, F = ma and action-reaction, plus formulas, a solved example and FAQs.

The periodic table made simple: who made it, how groups and periods work, metals vs non-metals, and the first 20 elements with symbols and an easy memory trick.

What is an IP address and how does it work? IPv4 vs IPv6, public vs private IPs, how to find your IP address, and what someone can and cannot do with it.

How QR codes work: the squares, error correction and data inside, why UPI uses them, static vs dynamic QR codes and how to avoid QR code scams.