Living Creatures

Why and how do spiders spin threads?

Human Biology

What is tetanus? What causes it?

Planet Earth

Which is the most nutritious fruit among those commonly eaten raw?

Human Biology

Why does sore throat look red?

World

How many workers were employed for construction of the Great Pyramid of Khufu?

Science and Technology

Why is foam of soap always white even if the soap is of different color?

Living Creatures

How does cockroach easily avoid a swipe? Which organ forewarns it about the attack?

Planet Earth

Which tree gives the lightest wood in the world? And which one is made of the heaviest?

Science and Technology

Why does hot water freeze faster than cold water?

How things work

How does meteorological department study the higher atmosphere for making weather forecast?

Human Biology

Why our height increases a little during night’s sleep?

Outer Space

When our Sun becomes a black hole, would it gobble up the Earth?

Planet Earth

How does tsunami form and why is it so destructive?

Science and Technology

Which liquid substance boils when it is cold?

How things work

Why does a candle flame defy gravity and burn upward? What will happen on lighting a candle in space?