Europe is the only continent without a desert.
62
The Sahara desert expands at about 1km per month.
90
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
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
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
Forest fires move faster uphill than downhill.
52
In 1850, only 8% of the people in California were women.
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