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
The Sahara desert expands at about 1km per month.
90
Every year, Alaska has about 5,000 earthquakes.
31
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
The average ice berg weighs 20,000,000 tons!
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