From the deepest past to the present day, the deserts of Morocco provide a panorama of life’s history on Earth and give us insight for our investigations of Mars. During a recent field trip to the Moroccan desert, scientists went fossil hunting in an ancient seabed that dates back to the Devonian Period, roughly 400 million years ago. What they found could help astrobiologists identify signs of life and interpret geological evidence of ancient, habitable environments on other planets.