The earth is approx. 6,588,000,000,000,000,000 tons.
175
In zero gravity, a candle's flame is round and blue.
16
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
For every gallon of sea water, you get more than a quarter pound of salt.
45
Sound travels fifteen times faster through steel than through air.
134
Some toothpastes and deodorants contain the same chemicals found in antifreeze.
38
Out of all the senses, smell is most closely linked to memory.
146