
Supernovae hit Earth between 3 million and 7 million years ago | Albiseyler
AND recent studies examines how Earth was hit by supernova explosions (plural supernova (SN)) that occurred between 3 million years ago (Mya) and 7 Mya in order to determine the distances from which these explosions originated. Using the living (not decaying) radioactive isotope 60-Fe, which is produced from supernovae, a team of University of Illinois…