This suggests that recognizing geometric shape regularity may be deeply ingrained in evolution, and could be more common in the animal kingdom than we've realized. "We humans – based on our unique ...

Get Instant Summarized Text (Gist) Crows have demonstrated the ability to recognize geometric regularity, a skill previously observed only in humans. Experiments showed that carrion crows could ...

Two-dimensional (2D) shapes are completely flat. 2D shapes can be found printed in a book or on a website. 2D shapes have sides and corners. A rectangle has 4 straight sides and 4 corners.