Sex burns about 360 calories per hour.
860
The average person's skin weighs twice as much as their brain.
131
You burn more calories sleeping than you do watching television.
348
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
One human hair can support 3 ounces.
191
The earth is approx. 6,588,000,000,000,000,000 tons.
175
By weight, Bone is five times stronger than steel.
417