Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Diamonds can be shattered with a hammer.
-104
Sound travels about 4 times faster in water than in air.
408
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
According to studies, men change their minds two to three times more often than women.
72
Pure water (H2O) does not conduct electricity on its own.
46