It takes about 20 seconds for a red blood cell to circle the whole body.
102
The human brain doesn't stop developing until about 25 years old.
102
Mushrooms are more closely related to humans than they are to plants.
47
Babies crawl an average of 200m a day.
212
The human body contains over a billion miles of DNA.
147
Yawns are more contagious among people with closer relationships.
163
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Pain occurs when sounds are above 130 db.
124