Are dark spots on Mars a sign of life?
![](https://cdn.sci.esa.int/documents/33745/35367/1567220830738-i_screenimage_29675.jpg)
Copyright: ESA 2002. Illustration by Medialab
(This composite image shows a Mars Orbital Camera image superimposed on a Hubble image of Mars. It is intended to be illustrative rather than scientifically accurate.)
Last Update: 1 September 2019