Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The human eye blinks an average of 4,200,000 times a year.
233
Mushrooms are more closely related to humans than they are to plants.
47
Your fingernails grow faster in summer.
744
Pain occurs when sounds are above 130 db.
124
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
Only humans shed emotional tears.
331
Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15