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
NYC's Metropolitan Transit Authority (MTA) dumps old subway cars into the ocean to serve as artificial reef.
8
Sea otters hold hands while sleeping so they don’t drift away from each other.
104
There was once an undersea post office in the Bahamas.
241
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
Water is actually naturally blue.
48
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
Two dogs were among the Titanic survivors.
262