When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Yawns are more contagious among people with closer relationships.
163
Poor eyesight (myopia) is associated with higher IQ.
232
You can't tickle yourself.
29
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Your thumb is about the same size as your nose.
124
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127