Researchers from the University of Washington and the German Space Agency say that a Greenland glacier is moving at unprecedented speeds. Comparing satellite data, they say the current speeds are four times faster than those observed on a glacier in the 1990s. Just how fast is fast for glacier? This one clocked in at 10 miles per year---setting the record for fastest glacier or ice stream in Greenland or Antarctica. And thanks to its fast melting, it has contributed an .03 inch rise in sea level in the past ten years and is expected to contribute a bit more over the next decade.