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 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
25
The United States has paved enough roads to circle the Earth over 150 times.
72
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
According to a study by the National Science Foundation, only half of Americans believe in evolution, and one in 4 don't know that the Earth orbits the Sun.
14
Earth is the only planet in our solar system that's not named after a god or goddess.
17
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
The Earth sees about 760 thunderstorms every hour, scientists have calculated.
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