Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
A ball of glass will bounce higher than a ball made of rubber.
73
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
4.5 pounds of sunlight strike the Earth each day.
27
Indoor pollution is 10 times more toxic than outdoor pollution.
62
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