One ragweed plant can release as many as one billion grains of pollen!
51
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108
The average temperature at 40,000 feet above sea level is -60 F.
56
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
Scientists in Germany have developed a candy that doesn't cause cavities.
11
Hot water can freeze faster than cold water.
181
Sound travels about 4 times faster in water than in air.
408