An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
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
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
More than 25% of the world's forests are in Siberia.
51