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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...


http://www.nature.com/news/2007/070806/full/070806-4.html

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 cosmic rays.
...