Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
There are more than 50,000 earthquakes throughout the world every year!
47
It's still possible to see the division between East and West Germany due to different light bulbs.
5
The Caspian Sea is also classed as the world's largest lake.
52
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
