Sessile polyps are flat growths that develop in the colon or intestines. There are several types of sessile polyps. These include sessile serrated adenomas, villous adenomas, tubular adenomas, and ...

This important study advances our understanding of early Cambrian cnidarian paleoecology and suggests that the reconstructed ancestral feeding and respiration mechanisms predate jet-propelled swimming ...

Xenoturbella bocki is a small marine worm predominantly found on the seafloor of fjords along the west coast of Sweden. This simple organism’s unusual evolutionary history has long intrigued ...