The Link Between the Local Bubble and Radioisotopic Signatures on Earth
  Traces of 2-3 Myr old 60Fe were recently discovered in a manganese crust and in lunar samples. We have found that this signal is extended in time and is present in globally distributed deep-sea archives. A second 6.5-8.7 Myr old signature was revealed in a manganese crust. The existence of the Local Bubble hints to a recent nearby supernova-activity starting 13 Myr ago. With analytical and numerical models generating the Local Bubble, we explain the younger 60Fe-signature and thus link the evolution of the solar neighborhood to terrestrial anomalies. 
Jenny Feige, Dieter Breitschwerdt, Anton Wallner, Michael M.   Schulreich, Norikazu Kinoshita, Michael Paul, Christian Dettb...
astro-ph.EP astro-ph.SR