Astronomie - Discovery of iron-60 and manganese-53 substantiates supernova 2.5 million years ago Stellar explosion in Earth’s proximity:https://t.co/E2doqAI5Vt’s-proximity/ pic.twitter.com/avA1Rsuqna

— Hansjürgen Köhler / CENAP (@CenapKoehler) October 2, 2020