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 ...

Deep in the ocean there are two animals living in unexpected harmony. A small species of scale worm chooses to make its home inside a carnivorous sponge. The sponge could eat the worm, but it doesn't ...