The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Check your map! Virginia extends farther west than West Virginia.
67
Forest fires move faster uphill than downhill.
52
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
Australia's Great Barrier Reef is 1,250 miles long!
45
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
There are approximately three chickens for every human on Earth.
13