A ball of glass will bounce higher than a ball made of rubber.
73
One ragweed plant can release as many as one billion grains of pollen!
51
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
The average home creates more pollution than does the average car.
33
Liquid TIDE laundry detergent glows under a blacklight.
96
A single speck of dust is half way in size between a subatomic particle and the Earth.
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