TWiM presents a protocol for evolving caffeine-tolerant yeast by high school students in the home, and how predator-prey dynamics change when multiple bacteria grow together in biofilms. Hosts: Vincent Racaniello, Michael Schmidt, Michele Swanson, Petra Levin. Guest: Mark O. Martin Subscribe to TWiM (free) on Apple Podcasts, Spotify, Google Podcasts, Android, RSS, or by email. Become a patron of TWiM. Links for this episode Caffeine-tolerant yeast selected at home (microPub Biology) yEvo Lab Vision and change in undergraduate biology (NAS) CURE in a box (JMBE) EvolvingStem EvolvingStem: Evolution-in-action curriculum (BMC) Spatial ecology of predation (PNAS) Predatory bacteria: From curiosity to curative (Trends Micro) Combating antimicrobial resistance with predatory Bdellovibrio (YouTube) Bdellovibrio attacking E.coli (YouTube) From one, many (YouTube) Take the TWiM Listener survey! Send your microbiology questions and comments (email or recorded audio) to twim@microbe.tv