Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Scientists are now able to grow 'beating' heart tissue in a lab!
162
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
Your brain is 80% water.
525
Indoor pollution is 10 times more toxic than outdoor pollution.
62
For every gallon of sea water, you get more than a quarter pound of salt.
45
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5