Scientists get cells to shift identities, raise new hopes,0,7891487.story?page=2

<p>From the Chicago Tribune&nbsp;<br /> &quot;This is just the beginning and we don’t really know exactly what it means,&quot; said Dr. Evan Snyder of Harvard Medical School and Boston Children’s Hospital, who discovered brain stem cells 15 years ago, the first such cells to be found in a solid organ. &quot;There’s an enormous amount of work to be done to prove that we’re not simply being fooled by things we see in tissue cultures.&quot;</p> <p>But Snyder’s discovery appears to shatter a major tenet of biology–that once nature created an organism, the blueprint was…</p>