The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Human hair and fingernails continue to grow after death.
7
All 13 minerals necessary for human life can be found in alcohol beverages.
282
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Cats have a weak sense of taste. They have only 473 tastebuds, humans have 9,000.
307
The human brain doesn't stop developing until about 25 years old.
102
On average, a human being will have sex more than 3,000 times and spend two weeks kissing in their lifetime.
161