Did You Know...?
21 is the atomic number of the element Scandium, which was discovered in Scandinavia in 1879 by spectral analysis of the minerals euxenite and gadolinite.
The Secret History of Lucky 21
Lucky 21 came out of the Gold Rush days, when young prospectors who struck great riches were said to have made the big time at the age of 21 -- hence “Lucky 21.”