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
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Nearly 50% of the world's scientists are assigned to military projects.
71
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
The average temperature at 40,000 feet above sea level is -60 F.
56
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79