Dr Reynolds, and others, have shown that under the influence of suitable growth factors, stem cells can lead full lives in a test tube.

ECONOMIST: Something new in mind

Scientists believe stem cell research could lead to treatment of diseases such as Parkinson's, Alzheimer's and diabetes.

CNN: Reaction mixed to stem cell decision

Scientists hope human embryonic stem cell research will lead to treatments and cures for many diseases, including diabetes, Alzheimer's and spinal cord injuries.

CNN: NIH announces owners of stem cells