Bok
06-13-2013, 04:13 PM
If a salamander loses its leg, it can grow a new one. Humans and other mammals are not so fortunate, but we can regenerate the tips of our digits, as long as enough of the nail remains. This was first shown some 40 years ago; today researchers finally reveal why it is that nails are necessary.
[More] (http://www.scientificamerican.com/article.cfm?id=how-nails-regenerate-lost-fingertips)
More... (http://www.scientificamerican.com/article.cfm?id=how-nails-regenerate-lost-fingertips)
[More] (http://www.scientificamerican.com/article.cfm?id=how-nails-regenerate-lost-fingertips)
More... (http://www.scientificamerican.com/article.cfm?id=how-nails-regenerate-lost-fingertips)