Katherine Johnson https://www.forbes.com/sites/erinspencer1/2020/02/24/nasa-mathematician–trailblazer-katherine-johnson-dies-at-101/ ♪───Ｏ（≧ RoyalElf ≦）Ｏ────♪ Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)