The Need For Mars Mission Exobiologists SpaceDaily

Not since the twin Viking Landers set down on the surface of Mars over 24 years ago, has NASA included a biologist, paleontologist, or ichnologist (study of trace fossils) on any of its missions. Viking was unique as the first spacecraft to land and search for life on another planet. As such, the Viking program enlisted the talents of three Principal Biology Investigators, a Biology Team Leader and co-experimenters.