From the cutting room floor, here are some of the outtakes about physiology that we thought was just too interesting not to use:
1. Dusty Sarazan describes one way that physiological research helped advance cardiac surgery, and also how research led to the development of the modern treadmill
2. David Linden talks about our imperfect memories
3. David Kraus tells us why we are so sensitive to the odor of hydrogen sulfide gas (what is hydrogen sulfide gas? where does it come from and what does it do?).