If eating what cavemen ate can make you healthier, then is it possible to be happier by partaking in activities that brought joy to our ancestors? According to a new theory, called the “savanna theory of happiness ” (aka paleo-happiness), it should—but there’s a slight catch. The theory explains that extremely intelligent and ambitious people don’t find happiness by hanging out with friends or seeing family. Instead, they find comfort in pursuing personal and professional projects solo. Read more about “paleo-happiness” at Science of Us.