Newly excavated bones from Gran Dolina cave in Spain reveal an ancient human relative practiced cannibalism on adults and children, but researchers still don't know why.

At first glance, Earth's biggest geological disasters seem to have little in common beyond their sheer scale. But for decades, scientists have wondered whether these seemingly unrelated events might actually follow a hidden rhythm stretching back hundreds of millions of...

A new study published in Neuroscience Bulletin suggests that mescaline, a chemical found in certain cacti that can cause hallucinations, may alter how the brain responds to incoming sensory information.

A new skull-based analysis of Neanderthal brains suggests that these ancient hominins’ range of intelligence largely overlapped with our own. The study was published in the Proceedings of the National Academy of Sciences USA.