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
You forget 90% of your dreams.
256
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
Obsessive nose picking is called Rhinotillexomania.
101
Gorillas can catch human colds and other illnesses.
205
We share 70% of our DNA with a slug.
218
Our Right Lungs takes more air than our left lung.
194
A person can live without food for about a month, but only about a week without water.
156