Science and Technology

How fast can a supercomputer work at the very most? Is there a theoretical limit on the speed of its operations?

World

Why did Columbus sail west instead of east if he wanted to reach India?

Living Creatures

If the venomous snake bites itself would it die?

Planet Earth

Why don’t we feel the motion of the rotating Earth?

Living Creatures

Relative to its body size which bird lays the largest egg?

Planet Earth

How did scientists determine that the Earth bulges at the equator?

Science and Technology

Why do radioactive materials like plutonium in nuclear waste continue to pose a threat for many thousands of years?

How things work

Who invented solar cells to harness the Sun's energy?

How things work

How fast can a helicopter fly?

Outer Space

Which is the most dangerous stage of a manned spaceflight?

Living Creatures

How do hummingbirds manage to hover in mid-air?

World

How did Adolf Hitler spend his last few days before committing suicide?

Outer Space

What are gravitational waves? Do they really exist?

Science and Technology

Did medieval alchemists have magical powers to form gold out of cheaper metals?

Outer Space

What is the chemical composition of the Sun? How do astronomers identify the types of elements it contains?