Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
A cubic yard of air weighs about 2 pounds at sea level.
31
Research indicates that plants grow healthier when they are stroked.
173
Indoor pollution is 10 times more toxic than outdoor pollution.
62
The bark of an older redwood tree is fireproof.
65