A Cosmic Airburst May Have Devastated a Vast Native American Culture 1,500 Years Ago

More than 1500 years ago, a vast culture known as the Hopewell tradition¬†(or Hopewell culture)¬†stretched across what is today the eastern United States.¬† The cause of the culture’s decline has long been debated, with war and climate change two of the possibilities, but now a new avenue of inquiry has opened up: debris from a … Read more