Richard Thyne KC, prosecuting, opened the case against a 15-year-old boy who denies the murder of Harvey Willgoose, also aged ...

A team of researchers from the Department of Clinical Neuroscience, Karolinska Institutet conducted three different experiments to get to the bottom of this mystery.

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New research suggests your pupils may reflect how clearly you remember something. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday.

His gaze softens as he draws closer to you. With one hand around your waist and the other cradling your jaw, he pulls you in. You look into his eyes, and notice his pupils have grown large and hungry.

The pupil as a window onto the brain could thus pave the way for new opportunities in sleep medicine and neuroscience. References Carro-Domínguez M, Huwiler S, Oberlin S, Oesch TL, Badii G, Lüthi A, ...