Research increases distance at which supernova would spark mass extinctions on Earth
Public Release: 11-May-2017 University of Kansas LAWRENCE -- In 2016, researchers published "slam dunk" evidence, based on iron-60 isotopes in ancient seabed, that supernovae buffeted the Earth -- one of them about 2.6 million years ago. University of Kansas researcher Adrian Melott, professor of physics and astronomy, supported those findings in Nature with…