In zero gravity, a candle's flame is round and blue.
16
The smell of freshly cut grass is actually a plant distress call.
31
Airports that are at higher altitudes require a longer airstrip due to lower air density.
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
Dr.Jonas Salk, the man who came up with the cure for polio, didn’t patent the drug. This made the drug more affordable to the general public, and he lost out an an estimated $7 billion dollars for himself.
41
If the chemical sodium is dropped into water it will immediately and violently explode.
67
According to studies, men change their minds two to three times more often than women.
72
Sound at the right vibration can bore holes through a solid object.
134