A hummingbird weighs less than a penny.
1k
The cat brain weighs about 30g.
167
A million dollars weighs about a metric ton. Hence the expression "a ton of money."
66
The earth is approx. 6,588,000,000,000,000,000 tons.
175
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 1 yen coin can be used as a weight, because it weighs exactly one gram. Also, it can float on water.
19
One human hair can support 3 ounces.
191
The elephant brain weighs about 6,000g.
274