Sea otters hold hands while sleeping so they don’t drift away from each other.
104
Jellyfish as a species are actually older than dinosaurs and sharks.
383
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
The Caspian Sea is also classed as the world's largest lake.
52
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
Water is actually naturally blue.
48
Two dogs were among the Titanic survivors.
262
Sharks, like other fish, have their reproductive organs in their chests.
248