Above: A custom-made barrel enzyme, a type of protein seen as redoubling the efficiency of industrial processes.Credit... Supported by By William J. Broad Artificial intelligence often gets criticized ...

When someone sees something that isn't there, people often refer to the experience as a hallucination. Hallucinations occur when your sensory perception does not correspond to external stimuli.

Hallucinations are unreal sensory experiences, such as hearing or seeing something that is not there. Any of our five senses (vision, hearing, taste, smell, touch) can be involved. Most often, when we ...

Phil Goldstein is a former web editor of the CDW family of tech magazines and a veteran technology journalist. The tool notably told users that geologists recommend humans eat one rock per day and ...