Forest fires and Antarctica are hard to picture together. Today the continent lies under a thick sheet of ice, and the cold preserves almost everything that falls on it. Around 90 million years ago, in the Cretaceous (the last period of the age of dinosaurs), the scene was very different. The planet was going through […]

In 2016, paleontologist David DeMar Jr. was crawling across a rocky outcrop in northeastern Montana, hunting for fish fossils, when he spotted a dark, reddish-brown nodule about half the size of a golf ball. He picked it up and looked at it through his hand lens. On its surface was something he didn’t expect: a […]