The Sahara desert expands at about 1km per month.
90
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
Australia's Great Barrier Reef is 1,250 miles long!
45
The Atlantic Ocean is saltier than the Pacific Ocean.
54
The water between India and Sri Lanka is only 3-30 feet deep and was purportedly passable on foot until 1480 AD when a cyclone moved some sand around.
1
Every year, Alaska has about 5,000 earthquakes.
31