Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Poor eyesight (myopia) is associated with higher IQ.
232
You forget 90% of your dreams.
256
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111
Tigers can see 6 times better at night than humans.
305
Yawns are more contagious among people with closer relationships.
163
On average a woman has 4 sexual partners in her lifetime.
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