March 24 (Reuters) - Revealing the limitations of cloning, researchers who repeatedly cloned mice for two decades have discovered that such serial duplication triggers grave genetic mutations that ...

Two decades of cloning experiments in mice have produced a striking pattern: animals created through somatic cell nuclear ...

(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 ...

But we have also learned something else: Over one-third of the House of Representatives believes that corporations and researchers—like Advanced Cell Technology in Worcester, Massachusetts, which has ...

Can you clone a clone forever? Landmark 20-year study reveals horrifying verdict - Scientists cloned 1,206 mice from one female donor over 20 years to test the limits of cloning ...

Stanford University announced yesterday it would create an institute to develop medical therapies from human embryonic stem cells, the promising but controversy-laden cells found inside human embryos.

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 ...

VATICAN CITY (Reuters) - A Vatican bioethics document Friday condemned artificial fertilization and other techniques used by many couples and also said human cloning, "designer babies" and embryonic ...