4.5 pounds of sunlight strike the Earth each day.
27
A cubic yard of air weighs about 2 pounds at sea level.
31
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
One barrel of petroleum holds 42 gallons.
20
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
The storage capacity of human brain exceeds 4 Terrabytes.
140
Diamonds can be shattered with a hammer.
-104
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310