"Theories are like toothbrushes," it's sometimes said. "Everybody has their own and nobody wants to use anybody else's." It's a joke, but when it comes to the study of consciousness—the question of ...

An unprecedented experiment seven years in the making has shaken the field of neuroscience. Researchers set out to answer one of science’s most puzzling questions: Where does consciousness come from?

Why does consciousness exist? The answer lies in the evolutionary origins of the simplest forms of subjective experience, not in studies of human consciousness alone, which represent just one special ...

How consciousness arises in the brain is no clearer after two big theories go head-to-head, but the competition's design could push the field forward. “Theories are like toothbrushes,” it’s sometimes ...