Science and Technology

What is time dilation? Is it possible for an astronaut to travel 2,000 light years in a lifetime?

Planet Earth

How did South Africa come to be so well endowed with minerals?

How things work

Which is the longest non-stop flight ever made by a commercial airliner?

Outer Space

Which has been the longest manned spaceflight so far? How long can astronauts stay in weightlessness?

Planet Earth

Why does stem of a tree always grow upward and roots grow downward into the ground?

Outer Space

How will our universe end? Have astronomers made any prediction about its ultimate fate?

Living Creatures

What is the world’s largest vulture? And where is it seen?

How things work

What happens if an aircraft flying in stormy weather is struck by lighting?

World

How did Greenwich become the center of the world time?

World

How many times did Christopher Columbus visit North America?

Planet Earth

Why is there a runaway greenhouse effect on planet Venus?

Planet Earth

What creates ripples like undulating patterns of sand in the desert?

Living Creatures

Why do the snakes living in deserts move sideways?

Planet Earth

Why don’t trees suffocate during autumn for they carry out respiration through leaves?

Planet Earth

How much is the Earth flattened at the Poles?