Diamonds can be shattered with a hammer.
-104
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Iron weighs more after it rusts.
16
Most dust particles in your house come from dead skin.
48
Sound travels about 4 times faster in water than in air.
408
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