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Stem Cells Breakthrough

Stem Cells Breakthrough

Three separate teams overcome a biomedical hurdle—creating stem cells without the use of human embryos.

arrow Stem Cells Poll

Should we create embryonic stem cells through cloning?

arrow Ask the Expert

George Daley of Children's Hospital Boston answers viewer questions about stem cell research.

arrow Video Extra

Enjoy a musical ditty about the three types of tissues stem cells can become.

arrow Relates Science News

Find recent stories on stem cell research.