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By Ewen Callaway of Nature magazine Human embryonic stem cells that are potentially pure enough to be used in therapies have been deposited into the UK Stem Cell Bank, and will soon be available across Europe.

By Ewen Callaway of Nature magazine A retina made in a laboratory in Japan could pave the way for treatments for human eye diseases, including some forms of blindness. Created by coaxing mouse embryonic stem cells into a precise three-dimensional assembly, the 'retina in a dish' is by far and away the most complex biological tissue engineered yet, scientists say