A volunteer archaeologist has discovered an ancient stash of Celtic coins, whose "value must have been immense," in Brandenburg, a state in northeastern Germany. The 41 gold coins were minted more than 2,000 years ago, and are the first known Celtic gold treasure in Brandenburg, Manja Schüle, the Minister of Culture in Brandenburg announced in December 2021. The coins are curved, a feature that inspired the German name "regenbogenschüsselchen," which translates to "rainbow cups." Just like the legend that there's a pot of gold at the end of a rainbow, "in popular belief, rainbow cups were found where a rainbow...