Daily Archives: November 21, 2017

November 30th is Smithson Tennant’s birthday. Tennant was an English chemist who first identified the elements osmium and iridium. Tennant was investigating platinum metal samples. Platinum ores had always given mineralogists a difficult time because the metal was difficult to extract from the ore and had slightly different properties from […]

Today In Science History – November 30 – Smithson Tennant