A healthy person has 6,000 million, million, million haemoglobin molecules.

Without its lining of mucus your stomach would digest itself.

At 15 inches the eyes of giant squids are the largest on the planet.

One in every 2000 babies is born with a tooth.

Quasars emit more energy than 100 giant galaxies.

In 5 billion years the Sun will run out of fuel and turn into a Red Giant.

A salmon-rich, low cholesterol diet means that Inuits rarely suffer from heart disease.

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