The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
We share 70% of our DNA with a slug.
218
The average person's skin weighs twice as much as their brain.
131
Early American humans hunted car-size armadillos and used their shells for houses.
12
The human brain has the capacity to store everything that you experience.
4k
Due to the angle at which the optic nerve enters the brain, staring at a blue surface during sex greatly increases the intensity of orgasms.
252