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Fossil frogs yield 'soft tissues' By Helen Briggs Science reporter, BBC News The specimens were found in Spain Scientists have extracted marrow from the bones of frogs and salamanders that died 10 million years ago in the muddy swamps of north-eastern Spain. The first fossilised bone marrow known to science provides a rare insight into the make-up of prehistoric animals. It is preserved in remarkable detail; usually only hard tissue such as bone survives in the fossil record. The soft tissue may yield traces of protein and DNA, researchers report in the journal Geology. Bone marrow is the tissue that...