A new study examining diary calf cognition found calves fed more milk were more likely to prioritize play than food-seeking ...

Source: Petr Hamerník, CC BY-SA 4.0, via Wikimedia Commons. How do you ask an animal if it is in pain? It can be challenging, since many species have evolved to hide potential vulnerability. At the ...

From an evolutionary biology point of view, it's not immediately obvious why humans spend so much time on recreation and play. In humans, as well as other animals, time spent playing is time not spent ...

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