10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
Mexico City is built on top of an underground resevoir!
47
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
It's still possible to see the division between East and West Germany due to different light bulbs.
5
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
In 1850, only 8% of the people in California were women.
0
The Niagara Falls moves upstream at an average rate of about 295ft a century!
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