Greg Fournier is an associate professor of geobiology at MIT. Greg’s work focuses on the microbial world, and by studying the evolution of microbes, he and his team further our understanding of the history of life on Earth.In this episode, Sally and Greg discuss fine-tuning our understanding of evolution; lab life and how research surprises often lead to new discoveries; and advice for those just beginning a career in science.Links mentioned in this episode:* Greg Fournier (https://eapsweb.mit.edu/people/g4nier)* Fournier Lab (https://fournierlab.scripts.mit.edu/web)* Craters of the Moon (https://www.nps.gov/crmo/index.htm)* Wind Cave (https://www.nps.gov/wica/index.htm)* Permian–Triassic mass extinction (https://en.wikipedia.org/wiki/Permian%E2%80%93Triassic_extinction_event)* Purgatory Chasm (https://www.mass.gov/locations/purgatory-chasm-state-reservation)* NASA postdoctoral fellowship (https://astrobiology.nasa.gov/nai/directory/fournier-greg/index.html)* Course 1 (http://catalog.mit.edu/subjects/1/)* EAPS (Earth, Atmospheric, and Planetary Sciences) (https://eapsweb.mit.edu/)Transcript:https://news.mit.edu/podcast/podcast-curiosity-unbounded-episode-3-decoding-tree-life (https://news.mit.edu/podcast/podcast-curiosity-unbounded-episode-3-decoding-tree-life)