Explore how crows can hold grudges for up to 17 years, showcasing their incredible memory and recognition skills.

Math isn't just a human thing. All kinds of animals, from African grey parrots to chimpanzees, are thought to have some kind of mathematical ability, but it can be hard to test. Now, a new study finds ...

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The crow stared at the screen, as it had many times before. Six shapes appeared. Five were neat, balanced, regular; one was not. The crow tilted its head, paused, and tapped the odd one out. A chime ...