Some were the size of a dog. Others were as large as polar bears. A newly-discovered fossil of the ferocious hyaenodont is ...

The show, narrated by Tom Hanks, offers glimpses of critters large and small. And capturing that footage is no small feat.

Some baleen whale species are capable of evading orcas — their only known predators — by using stealth-like communication, according to new research. Specifically, the marine mammals can sing at ...

Seeing Beluga whales at the Georgia Aquarium makes me wonder how anyone would want to kill or otherwise harm them.

Killer whales, or orca, are moving into Arctic waters once blocked by ice, preying on narwhal, beluga and bowhead whales and ...

There are more than 70 species of toothed whales, including sperm whales, orcas (which are technically the largest species of dolphin), bottlenose dolphins, beluga whales ... whales have few natural ...

Killer whales are the only natural predator of baleen whales—those that have "baleen" in their mouths to sieve their plankton ...

Marineland has euthanized a seven-year-old beluga whale after a long battle with several different medical conditions, making it the 18th such whale to die at the Niagara Falls, Ont., tourist ...

Marineland says it has euthanized a seven-year-old beluga after a long battle with several different medical conditions.Visitors watch as beluga whales swim in a tank at Marineland amusement park in ...

Marineland says it has euthanized a seven-year-old beluga after a long battle with several different medical conditions.Visitors watch as beluga whales swim in a tank at Marineland amusement park ...

Marineland has euthanized a seven-year-old beluga whale after a long battle with several different medical conditions, making it the 18th such whale to die at the Niagara Falls, Ont., tourist ...