SF Bicycle Coalition & Exploratorium Rec Ride: Bicycles and the Human Machine

"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."