Photo detail

AssociatedPress University of California, Irvine, researcher Hans Keirstead holds a special bottle with human embryonic stem cells Dec. 7 in his lab at the Gillespie Neuroscience Research Facility in Irvine, Calif. In his cramped labs, paralyzed rats have been made to walk with stem cell injections.

Stories this photo appears in:

Comments

Use the comment form below to begin a discussion about this content.

Sign in to comment