Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Sound travels about 4 times faster in water than in air.
408
Sound travels fifteen times faster through steel than through air.
134
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Galalith is a type of plastic that can be made from milk. It is odourless, insoluble in water, biodegradable, anti-allergenic, antistatic, and virtually non-flammable.
1
Iron weighs more after it rusts.
16
Hot water can freeze faster than cold water.
181