"The Exploratorium and SF Bicycle Coalition are teaming up to show the science of biking. Join Exploratorium educator Ken Finn and Exploratorium writer Robin Marks as they lead an 8-10 mile excursion through the physiology of exercise. Dissect chicken legs to identify muscle groups, trace the path of blood flow through a pig’s heart, and take some measurements yourself as you challenge your body and take in some scenery on San Francisco’s up and down (and sometimes flat) streets."