Envy may be humanity’s oldest flaw. In the Judeo-Christian creation story, Cain kills Abel after God favors Abel’s offering. Whether or not one reads the story literally, it captures something psychologically ancient:... Read more »
Source: Mermek Avitia/Pexels Animal play is fun, fair, chaotic, and serious business. The many ways in which nonhuman animals (animals) play with one another continues to intrigue many people—researchers, citizen scientists, and... Read more »