A cubic yard of air weighs about 2 pounds at sea level.
31
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
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
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Sound at the right vibration can bore holes through a solid object.
134
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
Aluminum used to be more valuable than gold!
84
According to studies, men change their minds two to three times more often than women.
72