Astrobiology Magazine’s Henry Bortman is in the field alongside scientists and astronauts who are working on the Pavilion Lake Research Project (PLRP). In his fourth field report, Bortman discusses work being done to determine the role biology plays in forming the Pavilion Lake microbialites. The work could help develop techniques and technology to aid in the search for life on other worlds. With Astrobiology Magazine, ask questions of researchers in the field, and watch their video responses.