10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
It's still possible to see the division between East and West Germany due to different light bulbs.
5
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
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
Mexico City is built on top of an underground resevoir!
47
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
Every year, Alaska has about 5,000 earthquakes.
31