NATURE WANTS YOU DEAD: And You Thought "Your" Planet Was A Toxic Wasteland

Whatta dump: Mars is bathed in ultra violet light which turns the Martian soil sterile. Photograph: Reuters

Ian Sample / The Guardian: 
Mars covered in toxic chemicals that can wipe out living organisms, tests reveal

Discussion:

Tyler Adkisson / AOL:   Mars' toxic surface may prevent humans from living there

Nature:   Perchlorates on Mars enhance the bacteriocidal effects of UV light

Sputnik International:   Red Dead Wasteland: Mars More Hostile to Life Than Expected

Swapna Krishna / Engadget:   Mars is even more toxic to life than we thought

MARS to TERRA: We don't want your kind 'round here, Earthling scum!