More than 500 million years ago, during what is known as the Cambrian period, the seas and oceans on Earth were filled with a ...

Researchers at the Technion have discovered how changes in genetic regulatory sequences can lead to alterations in the form and structure of animals—even when genetic regulatory systems are stable and ...

Embryonic germ layers are the fundamental organizing principle in animal development. They provide the structural basis from which tissues and organs arise. During early embryogenesis, cells divide to ...

The evolution of snakes, believed to have emerged around 160 million years ago from ancestral lizards, remains a scientific ...

Scientists once assumed that evolution would eventually force every member of a species to behave in more or less the same ...

A bizarre new giant dinosaur discovered in Argentina is giving paleontologists a fresh look at how Jurassic titans evolved in ...

The bird retina is one of the most energetically expensive tissues in the animal kingdom, yet it doesn’t use the energy ...

A new interdisciplinary review published in The Quarterly Review of Biology argues that red meat, once an essential component ...

Armed with a spring-loaded club and a devastating ‘double whammy’ strike, this shrimp is one of evolution’s strangest ...

With rodent teeth, bat-like ears and a woodpecker-inspired hunting strategy, this primate may just be one of evolution’s ...