INSEL POEL, Germany (AFP) -- A special boat carrying a stranded humpback whale whose weeks-long struggle to survive has captured hearts in Germany set off for the open seas on Tuesday evening in a last-ditch rescue attempt. Rescuers had earlier succeeded in coaxing the animal into the barge, which has a water-filled hold and is usually used to carry other boats, in an attempt to return it to its natural habitat. The whale, dubbed "Timmy" by German media, and its ordeal have gripped the country s