Animals have evolved crab-like bodies at least five times throughout history, a process known as carcinization.

Red blood is the exception, not the rule. Evolution has painted it green, purple and white in animals that push physiology ...

While domestic animals gradually became larger over the last 1,000 years, wild animal body sizes shrank. A new study conducted in Mediterranean France identifies one clear common denominator driving ...

A new study theorizes that evolution ticks at different speeds, especially when a big group of organisms first appears.

The oldest fossilised remains of complex animals appear suddenly in the fossil record, and as if from nowhere, in rocks that ...

Carcinization is the separate, five-time evolution of crabs. Parallel evolution isn’t unheard of by any means, but crabs have done it a lot. Their repeated similar evolution makes them interesting to ...

An artist’s impression depicts Kryoryctes at Dinosaur Cove in Australia. New research supports the hypothesis that Kryoryctes is a common ancestor of both the platypus and echidna. - Peter Schouten ...

Sponges are among Earth's most ancient animals, but exactly when they evolved has long puzzled scientists. Genetic ...