Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
16
Iron weighs more after it rusts.
16
One third of the electricity produced on earth is used to power electric light bulbs!
75
Sound travels about 4 times faster in water than in air.
408