SCIENCE IN THE NEWS DAILY
Extinct Animals May Be Back
from the Times (London)
Scientists say that they have taken a step closer to recreating extinct animals like the mammoth, after successfully cloning living mice from donor animals that had been frozen. A team of Japanese scientists produced the clones after thawing mice that had been frozen at minus 20C for up to 16 years.
Clones had been created previously only from live donor cells; cloning from frozen cells has been seen as difficult because DNA can be damaged by ice crystals.
A team at the Centre for Developmental Biology, at the RIKEN research institute in Kobe, collected the nuclei from brain cells of the frozen animals.
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