Hydrochloric acid likewise helps to dissolve the stomach contents while killing potentially harmful bacteria. The resulting semifluid paste—chyme—is sealed in the stomach by two ringlike ...

The study found that gastric cells in some individuals carried three copies of certain chromosomes, hinting toward exposure to an unknown mutagen.

Anatomist, Claire Smith, is showing me a real human digestive system. 'It's a vast, alien-looking mass of tubes. 'And this is the stomach.' DR CHRIS VAN TULLEKEN:I guess I thought it would be a ...

But little is known about how and what these pterosaurs ate. The spectacular discovery of fossilized stomach contents in two pterosaur species, Dorygnathus and Campylognathoides, from the Early ...