The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
The state with the longest coastline in the Continental U.S. is Michigan.
31
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
Europe is the only continent without a desert.
62
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
Israel's Dead Sea is 1,312 feet below sea level.
48
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49