Mars’ toxic chemicals 13th July 2017NewsDeleted User Mars covered in toxic chemicals that can wipe out living organisms, tests reveal | Science | The Guardian https://www.theguardian.com/science/2017/jul/06/mars-covered-in-toxic-chemicals-that-can-wipe-out-living-organisms-tests-reveal?utm_source=esp&utm_medium=Email&utm_campaign=GU+Today+main+NEW+H+categories&utm_term=233941&subid=17322110&CMP=EMCNEWEML6619I2