Israel's Dead Sea is 1,312 feet below sea level.
48
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
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
Europe is the only continent without a desert.
62
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55