Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The human brain has the capacity to store everything that you experience.
4k
You can't tickle yourself.
29
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Crying literally alleviates stress and uniquely allows humans to decrease feelings of anger and sadness.
24
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