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DNA Half Life
Interesting tho not necessarily dino related - and that perhaps in the
sense that it might imply there cain't be no Jurassic Park...
Microbes frozen in the oldest ice on Earth have been thawed out and
brought back to life in the laboratory, providing new insights into how
long living creatures can be frozen.
However, while some bacteria taken from 100,000-year-old ice reproduced
quite readily, cells from the oldest ice multiplied only very slowly and
their DNA was badly damaged. Studies of isolated DNA from the samples
showed that it had become increasingly fragmented as time went on.
By analysing samples of ice varying from 100,000 years to eight million
years, Bidle and colleagues calculated a 'DNA half-life'; the length of
DNA fragments in the ice halves every 1.1 million years. This
fragmentation is consistent with the idea that the DNA is being damaged by