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Japanese geneticists clone mice dead for 16 years.

“We have demonstrated that even frozen animal tissue can be used to produce clones,” said Teruhiko Wakayama, a geneticist at the Riken Center for Developmental Biology in Kobe, Japan.

For their cloning process, Wakayama and his colleagues drew dead brain and blood cells from the frozen mice. The researchers injected the nuclei from the dead cells directly into unfertilized mice eggs, creating embryos.