Astronauts cannot belch - there is no gravity to separate liquid from gas in their stomachs.

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

The African Elephant gestates for 22 months.

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

Wireless' communications took a giant leap forward in 1962 with the launch of Telstar, the first satellite capable of relaying telephone and satellite TV signals.

Wounds infested with maggots heal quickly and without spread of gangrene or other infection.

It would take over an hour for a heavy object to sink 6.7 miles down to the deepest part of the ocean.

A quarter of the world's plants are threatened with extinction by the year 2010.