A hummingbird weighs less than a penny.
1k
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 cat brain weighs about 30g.
167
The elephant brain weighs about 6,000g.
274
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
One human hair can support 3 ounces.
191
Dieters who sleep more take off more fat that those who sleep less.
159