The cat brain weighs about 30g.
167
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
Most elephants weigh less than a blue whale's tongue.
442
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
A hummingbird weighs less than a penny.
1k
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
You burn more calories sleeping than you do watching television.
348