The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
8
Every year, Alaska has about 5,000 earthquakes.
31
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59