Balsa wood is classified as a hard wood!
41
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
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
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
For every gallon of sea water, you get more than a quarter pound of salt.
45
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
The sun is 330,330 times larger than the earth.
75
