The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Fingernails grow nearly 4 times faster than toenails.
31
Every cigarette smoked cuts at least five minutes of life on average, which is roughly the time it takes to smoke one cigarette.
118
Fidgeting can burn about 350 calories a day.
201
Your ears secrete more earwax when you are afraid than when you aren't.
229
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
If you are cold you are more likely to be hungry because you use energy to keep warm.
143
Every year your body replaces 98% of your atoms.
119