Pumice is the only rock that floats on water.
14
One ragweed plant can release as many as one billion grains of pollen!
51
The storage capacity of human brain exceeds 4 Terrabytes.
140
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 single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
16
One 75-watt bulb gives more light than three 25-watt bulbs.
57
One barrel of petroleum holds 42 gallons.
20