A hummingbird weighs less than a penny.
1k
The average person's skin weighs twice as much as their brain.
131
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 elephant brain weighs about 6,000g.
274
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Sex burns about 360 calories per hour.
860
Dieters who sleep more take off more fat that those who sleep less.
159