Life on Earth began at least 3.5 billion years ago, as evidenced by the discovery of fossils from that time period.

Authors

• Person: Not available Organization: Space.com
  The Fermi Paradox - Where are all the aliens? - Space

Sources

• The Fermi Paradox - Where are all the aliens? - Space www.space.com Space.com via serper

Referenced by nodes (1)

• Earth location