Sex burns about 360 calories per hour.
860
You burn 26 calories in a one minute kiss.
605
By weight, Bone is five times stronger than steel.
417
Fidgeting can burn about 350 calories a day.
201
A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5
A hummingbird weighs less than a penny.
1k
A million dollars weighs about a metric ton. Hence the expression "a ton of money."
66
The elephant brain weighs about 6,000g.
274