January 24, 2019

How old is the moon?

The Moon is about 4.5 billion years old and is the only natural satellite in our Solar System. The moon formed about 30–50 million years after […]
January 24, 2019

How old is Homo sapiens (the human species)?

Hominids evolved and developed for millions of years prior to the arrival of Homo sapiens on the Earth. This evolution was slow. The development of a […]
January 24, 2019

Why does the sun rise and set?

It’s not the sun that soars across the sky. The Earth itself is rotating on its axis – one full rotation per day – and that […]
January 24, 2019

Will the sun ever burn out?

Yes, the sun will eventually burn out. But not for a long, long time. The sun has used up about half of its hydrogen fuel in […]