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
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
The names of the continents all end with the same letter with which they start, excluding the North and South infront of AmericA.
86
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243