Every human spent about half an hour as a single cell.
144
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 oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
Your thumb is about the same size as your nose.
124
One human hair can support 3 ounces.
191
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
You can't tickle yourself.
29