A new report posits that the collision of two black holes or neutron stars may have produced a gamma ray burst that hit Earth in the 8th century, generating a variety of chemical isotopes that can be found in ancient tree rings and ice cores. What do you think?
“‘May have?’ Wow!”Silvio Mazzotti
“I’ve always wondered where all these isotopes came from.”Penney Scott
“Wow, tree rings just keep getting more and more interesting.”Don Gallardo