Whales are a group of mammals that live in oceans. They include some of the largest animals on Earth. The blue whale is the ...

The majestic blue-grey sei whales have begun to resurface along the Patagonian coast of Argentina, a region from which they had vanished nearly 100 years ago due to relentless hunting. This ...

Authorities originally identified the whale as a fin whale, but said later the carcass is that of a smaller sei whale. Marine animal experts are investigating the death of a 44-foot-long sei whale ...