Discover how extreme animal sizes, from the massive blue whale to the tiny shrew, shape their survival strategies.

Q. You wrote that blue whales are the largest mammals. What are the largest and smallest animals of other groups? What ecological problems do animals confront by being extremely big ...

Southern right whales have distinctive white and gray patches of thickened skin on their heads known as callosities. Because ...

A tourist reaching out to a curious cetacean. A joyous marriage celebration in Iraq. A cowboy hugging his daughter as he ...

A southern right whale swims with its calves in the waters of the South Atlantic Ocean on Oct. 5, 2022. Southern right whales are no longer reproducing at normal rates due to climate-induced changes ...

This year's gallery of winning images brings to attention a potpourri of mysterious, hidden sights and marine creatures that ...

The annual competition draws thousands of entries from across the world and brings together images from below the water’s surface that show the diversity and challenges of subaquatic life ...

"I’ve been down 3,000 feet alone in the ocean, which has got to be one of the loneliest places on the planet," Widder says.

For more than a century, biology textbooks have stated that vision among vertebrates - people included - is built from two clearly defined cell types: rods for processing dim light and cones for ...

Out in the British countryside, the examples of mutualism are as multifarious as they are marvellous. Take, for starters, a hypothetical good old meadow with ant hills strewn like grassy scatter ...