A cubic yard of air weighs about 2 pounds at sea level.
31
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
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
German chemists made a replica of a trophy the size of one molecule.
68
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
One barrel of petroleum holds 42 gallons.
20
Sound travels fifteen times faster through steel than through air.
134
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199