Whales are big, but why aren’t they bigger? A new study says the key factor is how many calories they can take in. Researchers came to this conclusion after using small boats to chase down 300 whales ...

Fifty million years ago, whales were four-footed, tailed land mammals about the size of wolves. Over the next 12 million years, these terrestrial whales evolved into fully aquatic animals, complete ...

Blue whales and other filter-feeding leviathans became giants when climate change introduced them to binge-eating, research has shown. At more than 100ft long, the blue whale is the largest vertebrate ...