Chimpanzee experiments suggest early humans were likely fascinated by crystals because of their unique transparency and ...

Jane Goodall’s research at Gombe Stream National Park revolutionized our understanding of chimpanzee intelligence. In 1960, she observed a chimp named David Greybeard stripping leaves from twigs to ...

When Aristotle claimed that humans differ from other animals because they have the ability to be rational, he understood rational to mean that we could form our views and beliefs based on evidence, ...