Sex burns about 360 calories per hour.
860
By weight, Bone is five times stronger than steel.
417
One human hair can support 3 ounces.
191
The cat brain weighs about 30g.
167
You burn more calories sleeping than you do watching television.
348
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
The elephant brain weighs about 6,000g.
274
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