"The Shell" - Rose Cousins

The human body has an amazing ability to adapt. We can survive extreme temperatures, (which is why us Canadians still exist), and situations. For example; when we feel threatened our body goes into "Fight or Flight" mode. We release hormones that speed up our heart rate, open our lungs and increase blood flow and pressure to our muscles in preparation to run or defend ourselves. Adaptation is how people overcome disease or sickness, severe operations like organ transplants, or even simply gain muscle.  In the BBC series, "Inside the Human Body", they "show how existence is a struggle and how, minute by minute, from your first breath to your last, your body performs countless small miracles to keep you alive." The series interviews a man who can hold his breath underwater for 9 minutes, a man who swims in glacial lakes so freezing that they would kill a normal person, and a woman who has lived for 10 years on nothing but potato chips.