One cubic foot of gold weighs more than 1,200 pounds!
78
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Pumice is the only rock that floats on water.
14
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
No matter how cold it gets, gasoline will not freeze.
107
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
The earth is approx. 6,588,000,000,000,000,000 tons.
175