Science and Technology

Why vaccination prevents us from having smallpox?

Outer Space

What is the difference between a meteor and a comet?

Human Biology

How much oxygen does a person consume in a minute?

Human Biology

How does the human body make blood?

Outer Space

Why stars flicker whereas planets shine steadily?

How things work

How much petrol the fuel tank of an airplane carries?

How things work

Why is a road linking two cities called highway?

Science and Technology

Why hot water appears milky white when drawn from the faucet?

Living Creatures

Which is the most venomous (poisonous) snake in the world?

Planet Earth

Why is rainbow shaped semi-circle? What is the reason for it being colorful?

Planet Earth

What is the weight of the planet Earth? Is it constant or increasing?

Outer Space

Did Neil Armstrong really go to the Moon or NASA had faked the Moon landings?

Science and Technology

What Are Sound Waves Made of?

Science and Technology

Which gasses are used in electric bulbs? Or is a vacuum left inside?

How things work

Why do sliced potato and apple turn dark in open air?