When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Playing Tetris after a traumatic event can prevent the development of traumatic memories and reduce the chance of having flashbacks.
30
Yawns are more contagious among people with closer relationships.
163
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
You can't tickle yourself.
29
Your fingernails grow faster in summer.
744
Women have about four times as many foot problems as men; lifelong patterns of wearing high heels often are the culprit.
111