A two-decade study into cloning has revealed a fundamental flaw in the technology, demonstrating that repeated duplication leads to an accumulation of fatal genetic mutations. Researchers in Japan ...

In 2005, Teruhiko Wakayama, a pioneer of cloning at the University of Yamanashi in Japan, cloned a single female mouse. The results were as expected: The mouse that was born was genetically identical ...

After operating in secrecy for years, a startup company called R3 Bio, in Richmond, California, suddenly shared details about its work last week—saying it had raised money to create nonsentient monkey ...