One cubic foot of gold weighs more than 1,200 pounds!
78
4.5 pounds of sunlight strike the Earth each day.
27
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Pure water (H2O) does not conduct electricity on its own.
46
A cubic yard of air weighs about 2 pounds at sea level.
31
Iron weighs more after it rusts.
68
Pumice is the only rock that floats on water.
14