The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Every year, Alaska has about 5,000 earthquakes.
31
Forest fires move faster uphill than downhill.
52
There are approximately three chickens for every human on Earth.
13
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