In 1850, only 8% of the people in California were women.
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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
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
Forest fires move faster uphill than downhill.
52
The average ice berg weighs 20,000,000 tons!
54
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
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More than 25% of the world's forests are in Siberia.
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