NASA picks ancient Martian river delta for 2020 rover touchdown

NASA has picked an ancient river delta as the landing site for its uncrewed Mars 2020 rover, to hunt for evidence of past life on Earth's neighboring planet, officials said Monday."The delta is a good place for evidence of life to be deposited and then preserved for the billions of years that have elapsed since this lake was present," Ken Farley, Mars 2020 project scientist at NASA's Jet Propulsion Laboratory, told reporters on a conference call.