Sound travels about 4 times faster in water than in air.
408
The bark of an older redwood tree is fireproof.
65
A cubic yard of air weighs about 2 pounds at sea level.
31
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
One barrel of petroleum holds 42 gallons.
20
According to studies, men change their minds two to three times more often than women.
72
Each day, up to 150 species of life become extinct.
-23
The smell of freshly cut grass is actually a plant distress call.
31