How Do Animals Re-Grow Limbs (And Why Can’t We?)

Starfish can regrow lost arms, and salamanders can sprout new limbs. So why can’t we? Sci Show explains the science of regeneration, and explores the limitations the humans face — and are trying to go beyond.
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Sources:
http://www.livescience.com/34513-how-salamanders-regenerate-lost-limbs.html
http://www.scientificamerican.com/article/new-limb-regeneration-ins/
http://www.sciencedaily.com/releases/2013/05/130520163727.htm?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+sciencedaily%2Ftop_news%2Ftop_science+%28ScienceDaily%3A+Top+News+–+Top+Science%29
http://www.hhmi.org/biointeractive/newt-limb-regeneration
http://www.scientificamerican.com/article/regrowing-human-limbs/
http://www.pnas.org/content/early/2013/05/17/1300290110
http://phenomena.nationalgeographic.com/2013/03/13/will-we-ever-regenerate-limbs/
http://anonymouse.org/cgi-bin/anon-www.cgi/http://phenomena.nationalgeographic.com/2012/09/26/spiny-mice-flaying-skin-healing-factor/
http://anonymouse.org/cgi-bin/anon-www.cgi/http://embryo.asu.edu/pages/abraham-trembley
http://anonymouse.org/cgi-bin/anon-www.cgi/http://phenomena.nationalgeographic.com/2011/05/12/an-entire-flatworm-regenerated-from-a-single-adult-cell/

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