the.com/rhenium
the last stable element discovered, hiding so well it nearly slipped Earth entirely
last foundFinal non-radioactive element discovered, in 1925
melting pointThird-highest of all elements, near 3186 Celsius
jet enginesSuperalloys for turbine blades devour most production
rare earthAmong the rarest stable elements in the crust
named forThe Rhine river, by its German discoverers