In order to understand what it means to hallucinate, we first must gain an appreciation of what hallucinogens do inside the brain. One of the best-studied hallucinogenic drugs is LSD. In the brain, ...

Perception may a collective guess. In 1978, that guess turned deadly.

What springs from the 'mind' of an AI can sometimes be out of left field. gremlin/iStock via Getty Images When someone sees something that isn’t there, people often refer to the experience as a ...

If you've used ChatGPT, Google Gemini, Grok, Claude, Perplexity or any other generative AI tool, you've probably seen them make things up with complete confidence. This is called an AI hallucination - ...

A hallucination is the experience of sensing something that isn't really present in the environment but is instead created by the mind. Hallucinations can be seen, heard, felt, smelled, and tasted, ...