The deepest part of any ocean in the world is the Mariana trench in the Pacific with a depth of 35,797 feet.

The speed of light is generally rounded down to 186,000 miles per second. In exact terms it is 299,792,458 m/s (metres per second – that is equal to 186,287.49 miles per second).

Inbreeding causes 3 out of every 10 Dalmation dogs to suffer from hearing disability.

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

The thermometer was invented in 1607 by Galileo.

The tallest tree ever was an Australian eucalyptus - In 1872 it was measured at 435 feet tall.

Micro-organisms have been brought back to life after being frozen in perma-frost for three million years.

The call of the humpback whale is louder than Concorde and can be heard from 500 miles away.