By weight, Bone is five times stronger than steel.
417
The elephant brain weighs about 6,000g.
274
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Fidgeting can burn about 350 calories a day.
201
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
The average person's skin weighs twice as much as their brain.
131
You burn more calories sleeping than you do watching television.
348