Add Yahoo as a preferred source to see more of our stories on Google. Cope's Rule, a classic evolutionary theory, states that animals tend to grow larger through evolutionary time. But there are lots ...

A microorganism whose evolutionary roots can be traced to the era of the first multicellular animals may provide a glimpse of how single-celled organisms made a critical evolutionary leap. In ...

When the environment changes dramatically, animals from mollusks to crows can make big changes in their behavior that enable ...

A series of whole genome and gene duplication events that go back hundreds of millions of years have laid the foundations for tissue-specific gene expression, according to a new study. The 'copy-paste ...

The mystery behind why Alaskan horses, cryptodiran turtles and island lizards shrunk over time may have been solved in a new study. The new theoretical research proposes that animal size over time ...

A fossil bed in China containing animals up to 554 million years old suggests that we may have to reconsider the idea that ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The story of two of ...

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This article was originally featured on High Country News. Increasing frequent and intense fires are shaping how species change, according to a paper published last year in the journal Trends in ...

The mystery behind why Alaskan horses, cryptodiran turtles and island lizards shrunk over time may have been solved in a new study. The new theoretical research proposes that animal size over time ...

Increasing frequent and intense fires are shaping how species change, according to a paper published last year in the journal Trends in Ecology & Evolution. While previous research tended to focus on ...