The city of Houston, Texas is built on a swamp and is slowly sinking!
89
More than 25% of the world's forests are in Siberia.
51
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
It's still possible to see the division between East and West Germany due to different light bulbs.
5
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138