People Touch Their Faces Dozens of Times an Hour
One study found participants touched their faces about 23 times per hour.
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The Body Makes Roughly a Liter of Saliva a Day
Saliva helps with digestion and keeps the mouth clean.
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Sliced Bread Was First Sold in 1928
Otto Rohwedder's bread-slicing machine was first used commercially in Chillicothe, Missouri.
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Levi Hutchins Invented a Mechanical Alarm Clock in 1787
It could only ring at 4 a.m., the time he needed to wake up.
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Humans Spend About a Third of Their Lives Asleep
That adds up to roughly 26 years for someone who lives to 80.