A human being loses an average of 40 to 100 strands of hair a day.
133
It takes approximately 12 hours for food to entirely digest.
93
The human sigh acts as a physiological reset button.
23
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
Early American humans hunted car-size armadillos and used their shells for houses.
12
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11
You can't tickle yourself.
29