Balsa wood is classified as a hard wood!
41
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Pumice is the only rock that floats on water.
14
Sound at the right vibration can bore holes through a solid object.
134
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6