Tigers can see 6 times better at night than humans.
305
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
A person can live without food for about a month, but only about a week without water.
156
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
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
We share 70% of our DNA with a slug.
218
Human hair and fingernails continue to grow after death.
7