Artist's concept of possible exploration of the surface of Mars (2005) chromolithograph art by NASA. Original public domain… https://www.rawpixel.com/image/11551191/image-background-face-personFree Image from public domain licenseArtist's concept of possible exploration of the surface of Mars (2005) chromolithograph art by NASA. Original public domain… https://www.rawpixel.com/image/11493516/image-background-face-personFree Image from public domain license