http://health.howstuffworks.com/human-body/parts/10-body-parts-that-can-be-rebuilt.htm
http://news.nationalgeographic.com/news/2012/13/130415-replacement-body-parts-longevity-medicine-health-science/
http://wonderfulengineering.com/10-body-parts-that-can-be-replaced-now/
http://www.therichest.com/business/technology/10-body-parts-shockingly-being-replaced-by-science/?view=all
https://www.youtube.com/watch?v=acVc6H7wYbA