Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Sound travels about 4 times faster in water than in air.
408
Aluminum used to be more valuable than gold!
84
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Liquid TIDE laundry detergent glows under a blacklight.
96
Sound travels fifteen times faster through steel than through air.
134