CU-Boulder is launching a new Massive Open Online Course, or MOOC, today about the many different microbial species that inhabit the human gut and how they may influence health and disease. The free course, titled G ut Check: Exploring Your Microbiome , is being offered through CU-Boulder and Coursera, and will be taught by CU-Boulder Associate Professor Rob Knight, Senior Research Associate Jessica Metcalf and Research Associate Katherine Amato, all of CU-Boulder’s BioFrontiers Institute.