Scientists at the government-backed research             institute Riken used the dead cell of a mouse that had been             preserved at minus 20 degrees Celsius (minus 4 degrees             Fahrenheit)—a temperature similar to frozen ground.
The scientists hope that the first-of-a-kind             research would pave the way to restore extinct animals such as the             mammoth.
The findings were published in the Proceedings             of the National Academy of Sciences in the United States.
The scientists extracted a cell nucleus from an             organ of the dead mouse and planted it into an egg of another mouse             which was alive, leading to the birth of the cloned mouse, the             researchers said.
“The newly developed technology of nucleus             transfer greatly improved the possibility of reviving extinct             animals,” the research team led by Teruhiko Wakayama said in a             statement.