Research by Assistant Professor Jacob S. Suissa at the University of Tennessee, Knoxville, is revealing complexity in how ferns have evolved. Instead of the vascular structure inside fern stems ...

Vision shapes how many animals find food, avoid danger and navigate their world. In animals with two eyes, eye placement is ...

For decades, one puzzle stood out among the many mysteries of early animal evolution: the missing origin story of bryozoans.

A laugh can feel spontaneous, messy, almost impossible to pin down. But deep inside that burst of sound, researchers found a ...

This volume is based on the National Academy of Sciences' Colloquium on the Tempo and Mode of Evolution. The articles appearing in these pages were contributed by speakers at the colloquium and have ...

For more than half a century, many biologists have leaned on the neutral theory of molecular evolution to explain how DNA and proteins change over time. The idea grew from early work in the 1960s, ...

In fact, when they were tickled, laughter from both apes and humans was isochronous, meaning that the laughs followed a ...