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
Unconsciousness will occur after 8-10 seconds after loss of blood supply to the brain.
93
Every human spent about half an hour as a single cell.
144
One human hair can support 3 ounces.
191
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
Your thumb is about the same size as your nose.
124
Modern humans first appeared about 200,000 years ago, but record keeping didn't begin until about 6,000 years ago. That means about 97% of human history is lost.
21