Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Hot water can freeze faster than cold water.
181
Your brain is 80% water.
525
One ragweed plant can release as many as one billion grains of pollen!
51
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
The average home creates more pollution than does the average car.
33