The longest glacier in Antarctica, the Almbert glacier, is 250 miles long and 40 miles wide.

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

The largest meteorite craters in the world are in Sudbury, Ontario, canada and in Vredefort, South Africa.

Giraffes often sleep for only 20 minutes in any 24 hours. They may sleep up to 2 hours (in spurts - not all at once), but this is rare. They never lie down.

Males produce one thousand sperm cells each second - 86 million each day.

Each rubber molecule is made of 65,000 individual atoms.

Every hour the Universe expands by a billion miles in all directions.

Human tapeworms can grow up to 22.9m.