The average person's skin weighs twice as much as their brain.
131
The cat brain weighs about 30g.
167
Sex burns about 360 calories per hour.
860
The earth is approx. 6,588,000,000,000,000,000 tons.
175
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