A hummingbird weighs less than a penny.
1k
Sex burns about 360 calories per hour.
860
A million dollars weighs about a metric ton. Hence the expression "a ton of money."
66
The cat brain weighs about 30g.
167
One human hair can support 3 ounces.
191
Fidgeting can burn about 350 calories a day.
201
By weight, Bone is five times stronger than steel.
417