Fungi could eat dangerous radiation to survive, an unexpected finding that could one day help feed astronauts in space.

Or at least astronauts willing to eat a crawling fungus.

The research began with the discovery of black fungus growing on the walls of Chernobyl's damaged, highly radioactive nuclear reactor and collected by robots. The fungus was rich with melanin, the same pigment that gives human skin its color, protecting the skin from solar and ultraviolet radiation. Melanin is found in many, if not most, fungal species.
http://www.space.com/scienceastronomy/070529_fungus_radiation.html