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
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
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114
Pumice is the only rock that floats on water.
14
According to studies, men change their minds two to three times more often than women.
72
Cold water weighs more than hot water.
93
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39