Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Balsa wood is classified as a hard wood!
41
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Liquid TIDE laundry detergent glows under a blacklight.
96
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Research indicates that plants grow healthier when they are stroked.
173