Supernova:a possible cause of mass extinction at the dawn of the Pleistocene

About 2.6 million years ago, an oddly bright light arrived in the prehistoric sky and lingered there for weeks or months. It was a supernova some 150 light years away from Earth. Within a few hundred years, long after the strange light in the sky had dwindled, a tsunami of cosmic energy from that same … Continue reading Supernova:a possible cause of mass extinction at the dawn of the Pleistocene