After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
The average person's skin weighs twice as much as their brain.
131
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
Pain occurs when sounds are above 130 db.
124
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
There are about 255 babies born worldwide every minute.
46
Yawns are more contagious among people with closer relationships.
163
The largest cell in the human body is the female egg and the smallest is the male sperm.
682