On the season 2 midseason finale we welcome Molly Karnes, a stable isotope ecologist and lab technician. Hear about a new regional drink - Cheerwine, using shark teeth (both modern and ancient) to understand the environment in four dimensions, predatory snails, how a lab technician is a bit like an instrument mechanic, and a new crossover between Sonic and Jello.

Joining the show today is Janie Wittmer, a PhD student focusing on hydrogeochemistry. Hear what happens if you were to drink incredibly pure water (hint: it's not great), what life is like in environmental consulting, how rocks can actually help with carbon emissions, and a recommendation for a potential electronic album of the year.

Joining us today is the newly minted Dr. Danielle (Danny) Peltier, a paleontologist or geologist/paleoanthropologist that studies human evolution through time. Ever wondered what it means when someone says they've defended their PhD? Listen to hear about everything that leads up to and then what happens during that process, culminating in becoming a doctor, along with learning about the volcanic connections to human evolution, working at White Sands National Park through Geoscientists in the Park (including why the sand stays so cool), the transition from undergraduate to graduate school, and tips for cooking for one or meal prep.