A hummingbird weighs less than a penny.
1k
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
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
The cat brain weighs about 30g.
167
The earth is approx. 6,588,000,000,000,000,000 tons.
175
By weight, Bone is five times stronger than steel.
417