HomeEarth's first continents may trace back to subduction 3.5 billion years ago – Phys.org Earth's first continents may trace back to subduction 3.5 billion years ago – Phys.orgCanada Earth’s first continents may trace back to subduction 3.5 billion years ago Phys.org How the rise of continents may have set the stage for life on Earth Phys.org