Have you ever looked at two circles of exactly the same size and sworn one was larger? If so, your eyes have been tricked by the Ebbinghaus illusion, a classic example of how context can shape what we ...

Lizards, birds and fish often sport vivid colors, from neon pink to deep violet, but most mammals are fairly drab. So why don't mammals match the vibrant hues of other animals? A number of factors ...

Internal clocks can tick very differently. While some people are most productive in the morning, others are only active later in the day or at night. This phenomenon is known in science and medicine ...

For animals such as fish and insects that can’t control their body temperature, heat waves could be particularly detrimental.

Sitting in the sunlit garden room, a small, light green parakeet gently climbs onto the outstretched finger of Gabe Cooper. Mr. Pickles, he’s called. The little bird is known at the facility for ...

The famous Ebbinghaus illusion, named for its discoverer, the German psychologist Hermann Ebbinghaus (1850–1909). Despite appearances, the two orange circles are the same size. Have you ever looked at ...