We don't know what alien life might be like. It could be wildly different from Earth’s own; if we're looking at microorganisms, especially their fossilized traces, we might not even recognize it as life if it’s too dissimilar. But what if it's not that different? Planet Earth has the only life that we know of, which is why astrobiologists are looking to it for a clearer idea of how life elsewhere might survive, or thrive. But they're not just looking at any life on Earth. The rest of this article is behind a paywall. Please sign in or subscribe to access the full content.

There are places in the Solar System that are considered possible candidates for hosting alien life. Mars is a prime example. It was once covered in water; could life have evolved there ? Could it still exist undergrou

See Full Page