From publisher blurb: Zoology Goes Out of This World! Get new options for your Starfinder explorers of the wild things of the universe, discovering new species and how to interact with them and unravel the secrets of life. Master life sciences with the bioengineer and exostentialist archetypes, with class features like reckless experimentation, psychic backlash, perfect companion evolution, and aberrant companion, plus two sample aberrant companions to follow your hero back home from the lab and go with them on their adventures!