When Mars was young parts of the planet may have been able to sustain RNA, a molecule that likely played a key role in the beginnings of life on Earth
Source:
https://www.newscientist.com/article/2237339-mars-may-once-have-had-right-conditions-for-rna-to-develop-into-life/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home