337 whales dead in Chile in one of history's biggest beachings

Biologist reports discovery made in June during observation flight over Patagonia region, as cause of whales' death remains unknown

The coast of southern Chile has become a grave for 337 sei whales that were found beached in what scientists say is one of the biggest whale strandings ever recorded.

Biologist Vreni Haussermann told the Associated Press Tuesday that she made the discovery along with other scientists in June during an observation flight over fjords in Chile's southern Patagonia region.