Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Iron weighs more after it rusts.
16
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
17
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
Every day, plants convert sunlight into energy equivalent to six times the entire power consumption of human civilization.
9
Indoor pollution is 10 times more toxic than outdoor pollution.
62
Sound at the right vibration can bore holes through a solid object.
134