the 20 cent euro coin (€0.20) has a thickness of 0.084in

"43" is a track on the debut album "Mushroomhead" released by the heavy-metal group Mushroomhead in 1995

"Thirty-Eight Witnesses: The Kitty Genovese Case" by A.M. Rosenthal is an account of the beating and murder of Kitty Genovese, that happened in 1964 in full view of 38 witnesses who didn't a thing to stop it

baseball player Joe DiMaggio died of cancer at 84

cats have 3 eyelids (the 3rd one is usually tucked away at the side of the eye)

Class of '84 is an episode (s3e22) in the comedy TV series "Gimme a Break!", in which final tests stand in the way of Nell and Katie each receiving their high school diplomas

in humans, the peripheral nervous system is a network of 43 pairs of nerves that connect the central nervous system to the body

the total number of sectors in the American roulette is 38

Uranus orbits the Sun only once every 84 Earth years

the volume of a cone or a pyramid is equal to its height times its base area, divided by 3