The sewer monster is made up of thousands of tiny organisms called bryozoans, or moss animacules, said N.C. State University biologist Thomas Kwak. Invertebrates, they bunch together in colonies and feed with tiny tentacles.

"They can get as big as the size of a watermelon," he said.

They've been known to clog pipes, but Raleigh officials aren't worried, even though bryozoans can move up to 10 centimeters a day. "I don't know if we've seen anything move on its own inside a sanitary sewer line," Public Utilities Director Dale Crisp said.

Previously, previously.

Machine Keeps Animal Hearts Beating for Research

Testing new cardiac techniques and devices on live animals requires proper oversight, regulation, and considerable expense. To overcome this, researchers at North Carolina State University developed a machine, specifically intended for study of mitral valve repair, that can pump a pig's heart straight from the slaughterhouse. "Researchers can obtain pig hearts from a pork processing facility and use the system to test their prototypes or practice new surgical procedures," says Andrew Richards, a Ph. D. student in mechanical engineering at NC State who designed the heart machine.