World

When and where did slavery start?

Science and Technology

Why is it not safe to put metal vessel in microwave oven?

Human Biology

What is the origin of the phrase “beer belly”? Does beer really cause pot belly?

Planet Earth

How is the mating ritual of octopus?

World

What is the origin of the word “buck” for dollar?

World

When and why did women start shaving their body hair?

How things work

How do night vision goggles work?

Living Creatures

How is silk made from a cocoon?

Living Creatures

Is it true that dragonflies can fly up to 60 mph?

How things work

Who invented chocolate chip cookies? What is the story behind it?

Outer Space

How was the Moon formed?

How things work

Why do we toast drinks to celebrate?

How things work

When and where was fork invented?

Living Creatures

Why are black cats considered bad luck?

Human Biology

How does breathing into a paper bag help hyperventilation?