Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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4.5 pounds of sunlight strike the Earth each day.
27
The average temperature at 40,000 feet above sea level is -60 F.
56
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Rafflesia Arnoldii is the largest flower in the world and can grow as big as an umbrella.
42
Sound travels about 4 times faster in water than in air.
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