How things work

What is horsepower? Why is it calculated on the basis of horse's physical strength?

World

What is the origin of the word 'robot'? And what were the first robots?

Planet Earth

Have the oceans always been salty?

Planet Earth

How do cracks appear in mud flats during the period of drought?

Science and Technology

How much energy is produced by collision of matter and antimatter?

Outer Space

Why is the sky dark if there are billions of stars in the Universe?

Outer Space

What is the fastest speed a spacecraft can achieve?

Living Creatures

How fast can a cheetah run? Can runners like Usain Bolt and David Rudisha beat cheetah on a racetrack?

Planet Earth

Why does fruit ripen? What causes the ripening process?

Planet Earth

How does Strangler Fig squeeze its host tree to death?

Planet Earth

Which countries are geographically spread over two continents?

How things work

Which is the greatest invention that has changed our lives in a big way?

How things work

How does petrol-electric hybrid car that uses regenerative braking work?

Planet Earth

Which is the wettest place in the world? Cherrapunji, Mawsynram, or Waialeale?

Planet Earth

How is noise pollution killing whales?