10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
The Sahara desert expands at about 1km per month.
90
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
The Atlantic Ocean is saltier than the Pacific Ocean.
54
Mexico City is built on top of an underground resevoir!
47
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