ɪn tˈuː θˈaʊzənd twˈɛlv, ˈændɹuː ˈɑːswəld pˈʌblɪʃt ɐn ˈɑːɹɾɪkəl ɪnðə pɹəsˈiːdɪŋz ʌvðə nˈæʃənəl ɐkˈædəmi ʌv sˈaɪənsᵻz ʌvðə jˌuːˌɛsˈeɪ ˈɑːɹɡjuːɪŋ ðˈæt, lˈaɪk hjˈuːmənz, ɡɹˈeɪt ˈeɪps hæv ɐ tˈɛndənsi tə jˈuːʃˈeɪpt wˈɛlbiːɪŋ θɹuː lˈaɪf.
In 2012, Andrew Oswald published an article in the Proceedings of the National Academy of Sciences of the USA arguing that, like humans, great apes have a tendency to U-shaped wellbeing through life.