Written for you by our author Krystal Kasal, edited by Gaby Clark, and fact-checked and reviewed by Andrew Zinin —this article is the result of careful human work. We rely on readers like you to keep ...

Fossilized bite marks suggest there could have been a dramatic tussle between a gigantic terror bird and an even more massive crocodile around 12 million years ago ...

Intro; Abstract; Acknowledgements; Contents; Chapter 1: How to Study Predator Recognition; 1.1 Observation in the Wild; 1.2 Experiments; 1.2.1 Experiments on Nests; 1 ...