Photo: Fossils Yield 10-Million-Year-Old Bone Marrow -- A First



The remains of a ten-million-year-old frog included fossilized bacteria (inset, top right) and collagen (below), a protein that forms connective tissue and other bodily tissues. The find also yielded fossilized bone marrow (bottom), showing an inner layer of yellow, fatty marrow, surrounded by an outer zone of red marrow.

Photographs courtesy Geology


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