One barrel of petroleum holds 42 gallons.
20
Nylon is made from coal and petroleum.
42
Iron weighs more after it rusts.
68
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
A ball of glass will bounce higher than a ball made of rubber.
73
MIT has developed a camera that captures the speed of light at a trillion frames per second.
20