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
The names of the continents all end with the same letter with which they start, excluding the North and South infront of AmericA.
86
There are approximately three chickens for every human on Earth.
13
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
More than 25% of the world's forests are in Siberia.
51