Fidgeting can burn about 350 calories a day.
201
One human hair can support 3 ounces.
191
A hummingbird weighs less than a penny.
1k
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
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
The earth is approx. 6,588,000,000,000,000,000 tons.
175
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99