Maria McNamara of University College Dublin in Ireland has announced that her team of scientists recovered intact bone marrow ten million years old from from the fossilized remains of salamanders and frogs. This is the first case where fossilized bone marrow was ever found. Coming on the heels of the 2005 report of fossilized red blood cells recovered from a
T. rex, this opens up new approaches to the study of extinct animals and how they developed in giving rise to modern-day descendants.
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