Now, scientists discover ice-spewing volcanoes on Pluto

Rather than spewing molten rock, volcanoes on Pluto would have released frozen water, and other ices such as nitrogen, ammonia or methane. (Source: NASA)
Scientists have discovered what appear to be ice-spewing volcanoes on the surface of Pluto, raising questions about how the tiny, distant world has been so geologically active, according to research presented on Monday.
The findings, released at an American Astronomical Society meeting in National Harbor, Maryland, paint a far more complicated