Sand Tiger Shark embryos fight each other in their mother s womb - the survivor is born

The Virginia opossum is the only marsupial (pouched mammal) indigenous to North America

No one can drown in the Dead Sea It is 25 percent salt which makes the water very heavy

Koalas do not drink They get all the moisture they need from the leaves that they ingest

All clams start out as males; some decide to become females at some point in their lives

Contrary to popular belief monkeys actually do peel their bananas and don t eat the skin

The Sun is a medium-sized star 1 392 000 km across - 100 times the diameter of the Earth

The Sun is a medium-sized star 1 392 000 km across - 100 times the diameter of the Earth

Rats multiply so quickly that in 18 months two rats could have over a million descendants

The name marshmallow comes from the plant marsh mallow a pink plant that grows in marshes

Rats multiply so quickly that in 18 months two rats could have over a million descendants

Rats multiply so quickly that in 18 months two rats could have over a million descendants

An owl can see a mouse moving from over 150ft away by a light no brighter than candlelight

The Sun weighs 2 000 trillion trillion tonnes - over 300 000 times the weight of the Earth

Because of their racing metabolisms hummingbirds are always two hours away from starvation