Sound travels fifteen times faster through steel than through air.
134
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
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
Cold water weighs more than hot water.
93
In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
16
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5