Canada's last captive killer whale died on Thursday at Marineland, according to local media. The orca, who has been in captivity since she was about 3 years old, was 47.

Experts don't know what's behind the years-long trend of whale deaths. But there's no evidence connecting the deaths to offshore wind development, which is less noisy than fossil fuel exploration.

This year's North Atlantic right whale calving season has ended with 15 calves spotted off the Georgia, Florida and Carolina coasts. It's not enough.

An 18-year-old sculpture caught a metro train after it crushed barriers at the end of the tracks early Monday.

Five endangered right whales have been spotted off the Georgia coast. They began returning this month to give birth.