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.
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The earth is approx. 6,588,000,000,000,000,000 tons.
175
Fidgeting can burn about 350 calories a day.
201
By weight, Bone is five times stronger than steel.
417
The adult human brain weighs about 3 pounds (1,300-1,400 g).
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The cat brain weighs about 30g.
167
A hummingbird weighs less than a penny.
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