Tigers can see 6 times better at night than humans.
305
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Our brains have a negativity bias and will remember bad memories more than good ones.
15
Yawns are more contagious among people with closer relationships.
163
On average, there's 100 billion neurons in the human brain.
83
The human eye blinks an average of 4,200,000 times a year.
233
By weight, Bone is five times stronger than steel.
417
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111