There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
Forest fires move faster uphill than downhill.
52