Mars z Hubbleova dalekohledu [https://commons.wikimedia.org/wiki/File:Mars_HST_Mollweide_map_1999.png, https://upload.wikimedia.org/wikipedia/commons/d/da/Mars_HST_Mollweide_map_1999.png, NASA. [Public domain]]
bakterie v meteoritu z Marsu ( wikipedie, public domain)