Blue sperm whales have only become as large as they are in response to long-term exposure to environmental factors - long-term, but really quite short-term compared to how long their kind, including ...

It’s hard to picture a creature so immense that a person could stand inside one of its arteries, yet that’s the reality of the blue whale—the largest animal ever to live on Earth. A detail like that ...

Only two blue whale births have ever been recorded in human history, both decades ago. This remains an extraordinary mystery given there used to be hundreds of thousands of blue whales before whaling ...

A blue whale mother and calf are swimming together in the Gulf of California in Baja, Mexico, one of the warm-water places blue whales spend their winter months. Only two blue whale births have ever ...