NEW YORK -- Whales are big, but why aren't they bigger? A new study says it's basically about how many calories they can take in. That's the conclusion of researchers who used small boats to chase ...

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 ...

WASHINGTON – Pacific coast grey whales have shrunk in length by an astonishing 13 per cent since 2000, adding to evidence that climate change and other human activities are making marine mammals ...