Origin of Life: from Mars? (Introduction)
Back to a form of panspermia. The article shows that we still have no idea how life started, where ever it was:-http://blogs.scientificamerican.com/life-unbounded/2013/08/29/maybe-mars-seeded-earths-life-maybe-it-didnt/?WT_mc_id=SA_CAT_SPCPHYS_20130829