A tiger walks the same worn groove along the edge of its exhibit like a broken record. A parrot methodically plucks out its ...

A guanaco successfully retrieves food from a cup with a lid. Trimmed from Caicoya et al. via Proceedings of the Royal Society B under CC BY 4.0 Hoofed animals that are outsiders in their social groups ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American A new study published in Proceedings of the ...