Happy Video Friday everyone! Last week we brought you a guy that toasts marshmallows in a volcano. This week we bring you a guy that sleeps in volcanoes. Ken Sims is an isotope geologist at the University of Wyoming, and sometimes he has to sleep inside volcanoes when he's doing his research work. Once again, for the second week in a row, I can think of about 1000 other places I'd rather sleep than inside a volcano. Luckily, we have people like Ken who are willing to take risks and continue to advance the science. Enjoy!