Scientists propose that a supernovae eight-million years ago created atmospheric ionization that triggered an enormous upsurge in cloud-to-ground lightning strikes, igniting forest fires around the globe. These infernos could be one reason ancestors of homo sapiens developed bipedalism—to adapt in savannas that replaced torched forests in northeast Africa leading proto-humans to walk on two … Continue reading “Supernova Sapiens” –Earthly Infernos 8-Million Years Ago Led Proto-Humans to Walk Upright