Explainer: what are stem cells?

09/12/2013 17:05

By Merlin Crossley

In a paper published in Cell yesterday, scientists from the US and Thailand have, for the first time, successfully produced embryonic stem cells from human skin cells. That sounds interesting, but what are stem cells and where do they come from? If you take a limb from a rose tree, and put it in soil, it will grow into a thriving bush. [Read more] ...