Far fewer polar bears cubs are surviving off Alaskas northern coast, a federal government report released Wednesday has concluded.

The study of polar bears in the south Beaufort Sea, which spans the northern coasts of Alaska and western Canada, also found that adult males weigh less and have smaller skulls than those captured and measured two decades ago.

[Read](http://www.wtopnews.com/?nid=220&pid=0&sid=976521&page=1 “Read the Story”) (AP via WTOP)