After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
One human hair can support 3 ounces.
191
Our eyes are always the same size from birth, but our nose and ears never stop growing.
269
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
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130
A human being loses an average of 40 to 100 strands of hair a day.
133
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13