One barrel of petroleum holds 42 gallons.
20
Iron weighs more after it rusts.
16
Stannous fluoride, which is the cavity fighter found in toothpaste is made from recycled tin.
65
4.5 pounds of sunlight strike the Earth each day.
27
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
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
Sound travels fifteen times faster through steel than through air.
134