It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
The Sahara desert expands at about 1km per month.
90
The Atlantic Ocean is saltier than the Pacific Ocean.
54
It's still possible to see the division between East and West Germany due to different light bulbs.
5
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138