Science and Technology

Why are dark things warmer than light colored or simply white things?

Science and Technology

Why a multistage rocket is needed to get a spacecraft off the Earth and into the space?

Outer Space

How will the Universe end? Or will it go on expanding forever?

How things work

Why an automobile's windscreen glass shatters into rounded pieces when it breaks?

World

Why are the ten basic numerals called Arabic numerals even though their script is not Arabic?

Science and Technology

Why is a problem in a computer program called a bug?

Science and Technology

How millions of transistors switch on and off to register the digital 1 and 0 in the microchip?

Science and Technology

Why the capacity of air conditioners is expressed in tons instead of horsepowers?

How things work

How are bombs made out of chemical fertilizers?

How things work

When and where were playing cards invented?

Science and Technology

Which was the world's first communication satellite? (Echo-1)

Science and Technology

How much helium is required for buoyancy if a person wants to go up in the air on a balloon?

Planet Earth

Which is the remotest inhabited island? How far is it from the nearest human habitation?

How things work

On milling maize (corn) we get maize flour then how is corn oil derived?

Planet Earth

What is the raw material of menthol?