Nature World News: The Arctic lake has disappeared, leaving behind ice and clouds in the region. The pool of water drained through cracks in the underlying ice July, 29. Researchers at UW Applied Physics Laboratory said that ice melts at the Arctic every summer. "Every summer when the sun melts the surface the water has to go someplace, so it accumulates in these ponds. This doesn't look particularly extreme," said Jamie Morison, a polar scientist at the UW Applied Physics Laboratory and principal investigator since...