A cubic yard of air weighs about 2 pounds at sea level.
31
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
Iron weighs more after it rusts.
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
Each day, up to 150 species of life become extinct.
-23
Diamonds can be shattered with a hammer.
-104
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61