It was once thought that nothing could take down the world's largest animal, the blue whale. But scientists have witnessed something unusual that shows these giants do have a predator to worry about.

The blue whale has long been considered the largest animal to have ever existed, even dwarfing the biggest known dinosaurs. But now a new species threatens to steal the crown, and upends what we ...

The sperm whale registers at 230 dB while the blue whale is at 188 dB. “For us to hear blue whale calls, they must be made at an intensity of 70 dB or more,” BBC writer Ella Davies reports.

The blue whale is the largest animal on Earth. It plays a vital role in the ocean ecosystem. These whales grow to massive sizes and have unique hearts. They communicate through underwater sounds.

Newly discovered ancient whale may have been heaviest animal ever There could be a new contender for heaviest animal to ever live. While today's blue whale has long held the title, scientists have ...

Aug 2 (Reuters) - Move over, blue whale. There is a new contender for the most massive animal in Earth's history. Scientists on Wednesday described fossils of an early whale unearthed in Peru ...

According to the World Wildlife Foundation, the largest animal in the world is the Antarctic blue whale. It can weigh up to 400,000 pounds and stretch an astonishing 98 feet in length.

Biology Massive Extinct Whale May Be the Heaviest Animal Ever The gargantuan creature, weighing upwards of 750,000 pounds, may have sat in shallow waters, scavenging carcasses 39 million years ago.

"Within seconds we realized, oh my God, a pack of killer whales is attacking a blue whale," researcher John Totterdell from the Cetacean Research Centre in Australia, told NPR.

"In terms of weight, P. colossus was definitely bulkier than a blue whale. But the overall body length was shorter than the blue whale [and measured] 20 meters (66 feet).

Goldbogen Lab/Duke Marine Robotics and Remote Sensing Lab; NMFS Permit 16111 Scientists recently recorded the heart rate of a wild blue whale for the first time, finding that sometimes the world's ...