Paper 'Early post-metamorphic, Carboniferous blastoid reveals the evolution and development of the digestive system in echinoderms' by Imran A. Rahman, Johnny A. Waters, Colin D. Sumrall and ...

The inner workings of a tiny fossil have been studied using X-ray microscopy, revealing evidence of the digestive system for the first time. Researchers from the University of Bristol, Appalachian ...

It squirts its digestive system out of its anus in a tangled, ... Sea cucumbers may look like slugs, but they are actually echinoderms, related to starfish and sea urchins.