The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
The average person's skin weighs twice as much as their brain.
131
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
The human brain doesn't stop developing until about 25 years old.
102
All 13 minerals necessary for human life can be found in alcohol beverages.
282
Yawns are more contagious among people with closer relationships.
163