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
Only humans shed emotional tears.
331
Human hair and fingernails continue to grow after death.
7
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
-137
Every human spent about half an hour as a single cell.
144
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 adult human brain weighs about 3 pounds (1,300-1,400 g).
99
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11