If the chemical sodium is dropped into water it will immediately and violently explode.
67
One cubic foot of gold weighs more than 1,200 pounds!
78
Iron weighs more after it rusts.
16
Research indicates that plants grow healthier when they are stroked.
173
Nylon is made from coal and petroleum.
42
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
