Outer Space

Why has Pluto been demoted being classified as dwarf planet?

Outer Space

What happens when two galaxies collide in the universe?

Planet Earth

What is pumice stone?

Human Biology

Why does laughter bring tears to the eyes?

Living Creatures

Is there any bird which is poisonous?

How things work

What is anemometer? How does it work?

Human Biology

What causes some people to faint all of a sudden?

Outer Space

What is a Quasar?

World

Who Invented The Pneumatic Tire? (Robert William Thomson)

Planet Earth

How high up do the highest clouds float?

Living Creatures

Why does a honey bee die after it stings a human being or an animal?

Planet Earth

How can a Peepal tree grow on a bare wall which apparently lacks nutrients?

Science and Technology

How many electrons are there in electric current?

Science and Technology

Why sand is attracted to magnet even though it is not a metal?

World

Why is number 13 considered unlucky?