A human being loses an average of 40 to 100 strands of hair a day.
133
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
The levels of two stress hormones, cortisol and epinephrine which suppress the body's immune system, will actually drop after a dose of laughter.
112
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127