BBC NEWS | Science/Nature | Fossil frogs yield 'soft tissues'
リンク: BBC NEWS | Science/Nature | Fossil frogs yield 'soft tissues'.
Scientists have extracted marrow from the bones of frogs andsalamanders that died 10 million years ago in the muddy swamps of
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 fills the centre of large bones, acting as a factory for producing new platelets and red and white blood cells.
There are two types: haematopoietic (which can produce blood cells) and stromal (which can produce fat, cartilage and bone).