The cat brain weighs about 30g.
167
By weight, Bone is five times stronger than steel.
417
You burn more calories sleeping than you do watching television.
348
You burn 26 calories in a one minute kiss.
605
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
A hummingbird weighs less than a penny.
1k
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Most elephants weigh less than a blue whale's tongue.
442