Have the Martians Already Invaded Earth?

Not only might the Martians be amongst us, but they may have also pulled off an ‘invasion of the body snatchers’ routine as well! A new research paper hypothesises proposes that certain strains of radiation-resistant microbes on Earth may have inherited their radiation-resistance from Martian microbes, carried to Earth from Mars or on meteorites – and that the exchange may have been two-way.

Was Earth Ever Infected by Martian Biota?
Clues from Radioresistant Bacteria

Found via futurismic.com.