In 1850, only 8% of the people in California were women.
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An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
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There are more than 50,000 earthquakes throughout the world every year!
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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
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
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The city of Houston, Texas is built on a swamp and is slowly sinking!
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Israel's Dead Sea is 1,312 feet below sea level.
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