Obsessive nose picking is called Rhinotillexomania.
101
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
You forget 90% of your dreams.
256
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
It takes about 20 seconds for a red blood cell to circle the whole body.
102