
Did a star blow up and hit Earth 10 million years ago?
A supernova could have sent cosmic rays hurtling at Earth muratart/Shutterstock An exploding star may have sent cosmic shrapnel flying to hit Earth 10 million years ago, and astronomers have now narrowed down the most likely culprits behind this interstellar incident. Earlier this year, Dominik Koll at the Helmholtz-Zentrum Dresden-Rossendorf in Germany and his colleagues…