The Arctic landscape during the Cretaceous Period may have been dominated by the dinosaurs, but the rivers and streams held something more familiar. Alaska’s fresh waters 73 million years ago were ...

Researchers have long assumed that a tube in the famous Pikaia fossil ran along the animal’s back. But a new study turned the fossil upside down. By Carl Zimmer Over the past 500 million years, ...

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

What do the ginkgo (a tree), the nautilus (a mollusc) and the coelacanth (a fish) all have in common? They don’t look alike, and they aren’t biologically related, but part of their evolutionary ...