The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
Mexico City is built on top of an underground resevoir!
47
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
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The Caspian Sea is also classed as the world's largest lake.
52
There are approximately three chickens for every human on Earth.
13
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
The Atlantic Ocean is saltier than the Pacific Ocean.
54