Quasars are the most distant objects in the Universe.

A dog's sense of smell is 1,000 times more sensitive than a humans.

Christian Barnard performed the first heart transplant in 1967 - the patient lived for 18 days.

The grey whale migrates 12,500 miles from the Artic to Mexico and back every year.

The largest desert in the world, the Sahara, is 3,500,000 square miles.

If our Sun were just inch in diameter, the nearest star would be 445 miles away.

Koalas sleep an average of 22 hours a day, two hours more than the sloth.

Microbial life can survive on the cooling rods of a nuclear reactor.