Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
The average ice berg weighs 20,000,000 tons!
54
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
Israel's Dead Sea is 1,312 feet below sea level.
48
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
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