(CNN) -- A human embryo, containing about a couple hundred cells, is smaller than the period at the end of a sentence. Scientists need strong microscopes to see these precursors to life, and to take ...

Researchers in Oregon claim to have solved the tricky problem of cloning human stem cells, but you're more likely to see a duplicate of a years-old ethics debate than you are a duplicate human. This ...

LINCOLN, Neb. (AP) -- The emotion, tumult and acrimony over human cloning, stem-cell research and abortion were compressed into one small meeting room Thursday in the Capitol. Dozens of people packed ...

Please enable JavaScript to read this content. After more than 15 years of failures, biologists have finally created human stem cells by the same technique that ...

Human cloning has been used to produce early embryos, marking a "significant step" for medicine, say US scientists. The cloned embryos were used as a source of stem cells, which can make new heart ...

Pluripotent stem cells are known for the need to grow as colonies in order to prevent differentiation. This adds complexity to the isolation/expansion of clonal populations following research ...

An entirely appropriate stew of scientific vexation and mortification has accompanied revelations that the incredible Korean achievements in human embryonic cloning and stem cell research are exactly ...

If there is one thing that people on both sides of the cloning debate agree upon, it’s that cloning is an incredibly inefficient process. When it comes to cloning animals, like Dolly and Snuppy, the ...

Scientists have made a major advance in overcoming the principal ethical objection to the medical use of stem cells derived from human embryos. They have generated embryonic stem cells - which might ...