NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.
8
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
Water is actually naturally blue.
48
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
There are approximately three million shipwrecks on the ocean floor, worth billions in value and treasure.
22
Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
6