An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
14
The Atlantic Ocean is saltier than the Pacific Ocean.
54
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
There are more than 50,000 earthquakes throughout the world every year!
47
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
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