Sex burns about 360 calories per hour.
860
A million dollars weighs about a metric ton. Hence the expression "a ton of money."
66
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
The 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
The Main Library at Indiana University sinks over an inch every year because when it was built, engineers failed to take into account the weight of all the books that would occupy the building.
240
By weight, Bone is five times stronger than steel.
417