By weight, Bone is five times stronger than steel.
417
You burn 26 calories in a one minute kiss.
605
A hummingbird weighs less than a penny.
1k
One human hair can support 3 ounces.
191
The cat brain weighs about 30g.
167
The average person's skin weighs twice as much as their brain.
131
Fidgeting can burn about 350 calories a day.
201
You burn more calories sleeping than you do watching television.
348