The state with the longest coastline in the Continental U.S. is Michigan.
31
The average ice berg weighs 20,000,000 tons!
54
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
Mexico City is built on top of an underground resevoir!
47
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
The Caspian Sea is also classed as the world's largest lake.
52
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119