Researchers have identified the mechanism for why hair goes gray with age and stress -- and in the process discovered a novel response to DNA damage in stem cells, they report in the June 12 issue of __Cell.__ It's generally thought that accumulated DNA damage is a likely culprit in aging phenotypes such as graying hair, but researchers have been unable to show a direct link, said linkurl:David Fisher;http://www2.massgeneral.org/cancer-research/profiles.aspx?id=156 chairman of the department of
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The liquid world of fetal development provides a rich source of nutrition and protection tailored to meet the needs of the growing fetus.
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