The peripheral drift illusion causes us to perceive motion in a still image. A new study shows that the mechanism of this illusion relies on changes in pupil size.

(CNN) — Mount Fuji is a UNESCO World heritage site, a world-famous landmark and an icon of Japan. But it has also become a “trash mountain” overcrowded by millions of tourists. To try and ...

Milwaukee, Wisconsin (CNN) — Angela Lang is about to send her canvassing teams door knocking. But first, a moment to outline the stakes: “Fair maps, abortion, voting rights,” is Lang’s list.

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Prediabetes is a condition characterized by high blood sugar levels. Some diet and lifestyle habits can help you manage your blood sugar levels and prevent the condition from progressing to type 2 ...

Have you ever put your eyes to the test with an optical illusion? This mind-boggling puzzle challenges your attention to detail by hiding a unique pair among a sea of lookalikes. Optical illusions ...