The bark of an older redwood tree is fireproof.
65
Most dust particles in your house come from dead skin.
48
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
A ball of glass will bounce higher than a ball made of rubber.
73
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79