Does life exist elsewhere in the universe? If so, how do scientists search for and identify it? Finding life beyond Earth is extremely difficult, partly because other planets are so far away and partly because we are not sure what to look for.
Yet, astrobiologists have learned a lot about how to find life in extraterrestrial environments, mainly by studying how and when the early Earth became livable.
While research teams at NASA are directly combing the surface of Mars for signs of life, our interdisciplinary research group is using a site here on Earth to approximate ancient environmental conditions on Mars.
A close-up view of the Clarkia site where you can see lacustrine clay and volcanic ash layers. This site represents Mars in our work. Taylor Vahey
