Indoor pollution is 10 times more toxic than outdoor pollution.
62
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
The sun is 330,330 times larger than the earth.
75
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
4.5 pounds of sunlight strike the Earth each day.
27
Iron weighs more after it rusts.
16
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65