The bark of an older redwood tree is fireproof.
65
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
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
In zero gravity, a candle's flame is round and blue.
16