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
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
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
One cubic mile of seawater contains about 50 pounds of gold.
79