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

A new study posits that same-sex sexual behavior developed to help primates in complex social groups ease tension, reduce ...

The origins of consciousness date back about 540 million years ago, when animal bodies became more complex. Feelings like ...

Blue blood may look alien, but it’s one of evolution’s most elegant solutions to life in extreme environments. Here’s how ...

Earth’s first sponges may have been ghostly, soft-bodied pioneers—ancient animals that evolved long before their skeletons ...

The missing link in the mystery turned out to be an event called the Cambrian explosion. It was only after it that living ...

Crab-like body shapes evolved independently at least five times, making “crab” more a design than a lineage. MAGA reacts to ...

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

This has been quite the wild year in human evolution stories. Our relatives, living and extinct, got a lot of attention—from ...

During the first few years of the COVID-19 pandemic, the virus SARS-CoV-2 was detected in an increasing number of non-human ...

With copper-blue blood prized by modern medicine and a body plan older than dinosaurs, the horseshoe crab reveals how ancient ...