We now must confront the goose - bump - raising questions: Did this small icy world host a second genesis of life in our solar system? (scientificamerican.com)
If life on Mars was the result of a «second genesis,» that is, it began completely separate from life on Earth, it might use combinations of organic chemicals we've never seen before. (discovermagazine.com)
Finding the spawn of a second genesis would be a revelation. (discovermagazine.com)