For a long time, researchers have puzzled over the flat patches on the teeth of ancient Europeans. After investigating the [… ...

In a study published Jan. 23 in the Journal of Paleolithic Archaeology, Willman looked at dozens of skeletons of Pavlovian people, who lived in Central Europe between about 25,000 and 29,000 years ...

We're all familiar with Pavlovian conditioning, in which a reward-anticipatory behavior follows a reward-predicting stimulus.