Nasa picks three drill sites for Mars 2020 mission

Nasa has narrowed down its quest to find alien life on the red planet by pin-pointing three potential target sites for its Mars 2020 mission. The US space agency will send its Mars 2020 rover to one of three drilling sites - each selected for their potential to host extraterrestrial life. The automated robot rover will scan the surface of the chosen landing site before taking detailed pictures and collecting rocky samples to bring back to Earth. The American space agency picked the three potential drilling sites during a workshop with planetary scientists in California on February 10. The site with the most votes - the Jezero crater - was once home to an ancient Martian lake.