Fidgeting can burn about 350 calories a day.
201
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
One human hair can support 3 ounces.
191
The cat brain weighs about 30g.
167
You burn more calories sleeping than you do watching television.
348
A hummingbird weighs less than a penny.
1k
The earth is approx. 6,588,000,000,000,000,000 tons.
175