In zero gravity, a candle's flame is round and blue.
16
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
Balsa wood is classified as a hard wood!
41
Scientists aren't sure what color dinosaurs were.
312
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71