Radar measurements on Mars show signs of ancient delta and w

Liquid water on ancient Mars seems to be essentially confirmed now.

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Oslo , Norway , David Paige , Svein Erik Hamran , California Institute Of Technology Jet Propulsion Laboratory , University Of Oslo , Mars Perseverance Rover , Jezero Crater Western Delta , Tor Berger , California Institute , Technology Jet Propulsion Laboratory , Jezero Crater , Radar Imager , Mar Subsurface ,