Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
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
The Atlantic Ocean is saltier than the Pacific Ocean.
54
Check your map! Virginia extends farther west than West Virginia.
67
The water of the Antarctica is so cold that nothing can rot there.
334
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
