According to their results recently published in the journal Ecology and Evolution, the culprit is clear: a killer whale ...

While the behavior isn't unheard of — orcas hunt everything from walruses and sea lions to ... but it may often be that the ...

He swam with killer whales ... to ban the captivity of whales and dolphins, faces a lawsuit entering its 8th year, and spirals around an aching loss of identity. The Walrus and the Whistleblower ...

The animals that could join the list are killer whales, hippos, walruses, narwhals, and sperm whales. The creatures are hunted and killed for their ivory which is often used in decorative carvings.