twenty

ps number 20
~ 20 is a tetrahedral number.
~ the atomic number of calcium.
~ the third magic number in physics.
~ the number 20 is used as an index in measuring visual acuity.
~ there are 20 baby teeth in the deciduous dentition.
~ twenty {lynyrd skynyrd album}, a 1997 album by lynyrd skynyrd.
~ cb slang for "a place", being short for "10–20", used in reference to a person or object's location.
~ the designation of interstate 20, a freeway that runs from texas to south carolina.
~ the number 20 is used 117 times in the bible.

through my ears i hear: