The Atlantic Ocean is saltier than the Pacific Ocean.
54
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
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
One cubic mile of seawater contains about 50 pounds of gold.
79
Every year, Alaska has about 5,000 earthquakes.
31