Following Donna Haraway’s suggestion that “it matters what matters we use to think other matters with; […] what descriptions describe descriptions. […] It matters what stories make worlds, what worlds make stories” (Haraway, 2016), this work looks at the human search for life on other planets and how we use an Earth-centric definition of life to do so. An example of this is NASA’s definition of life as “a self-sustaining chemical system capable of Darwinian evolution”. Currently there are more than 100 definitions of life but we are encountering organisms on Earth that push the notion of what a life form can be further. Extremophiles, viruses and chemical systems with life-like behaviours are expanding our understanding of life and suggest that we might not know the full spectrum of it in order to look for life on other planets. This work speculates about life that we cannot imagine and life that has evolved on Mars after we have possibly contaminated the planet by our extended presence there through our machines.