The average sperm cell swims at 8 inches per hour.
4
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
A person can live without food for about a month, but only about a week without water.
156
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
The human brain is more active during sleep than during the day.
28
Mushrooms are more closely related to humans than they are to plants.
47
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15