Indoor pollution is 10 times more toxic than outdoor pollution.
62
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Sound travels about 4 times faster in water than in air.
408
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Liquid TIDE laundry detergent glows under a blacklight.
96
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199