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
Sound travels about 4 times faster in water than in air.
408
Hot water can freeze faster than cold water.
181
Balsa wood is classified as a hard wood!
41
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
4.5 pounds of sunlight strike the Earth each day.
27