Human Journey

Hanging in the Rainforest Not as Fun as It Used to Be? It Might Be a Midlife Crisis.

Photo by Tim Laman

When people begin to worry about their mortality, they might fight the blues by buying a fancy sports car, having an affair, or even wearing a toupee. But, what is a great ape to do? This not a frivolous question because an international team of researchers has found that some of our closest primate relatives–chimpanzees and orangutans–also suffer from midlife crises. Psychologists have long observed that humans have U-shaped happiness curves over the course of their lives, meaning that their sense of well-being is high in their youth, declines during middle age, and rallies again later in life and it now appears that great apes follow the same pattern.

In a new study, keepers and volunteers at zoos and sanctuaries in five countries filled out questionnaires based on observations of their apes, chimpanzees and orangutans. They were asked to rate the mood of their charges, assess the pleasure that each ape gets from social situations, and consider how successful each animal is in achieving its goals. Keepers were even encouraged to imagine how happy they would be if they lived in an ape’s shoes–or, rather, their five-toed grasping feet–for a week.

One of the researchers, Professor Andrew Oswald of the University of Warwick, noted: “We hoped to understand a famous scientific puzzle: why does human happiness follow an approximate U-shape through life? We ended up showing that it cannot be because of mortgages, marital breakup, mobile phones, or any of the other paraphernalia of modern life. Apes also have a pronounced midlife low, and they have none of those.”

The study was published in the Proceedings of the National Academy of Sciences.

For all the latest science news, check out our twice-weekly news rundown, Earth Current.

Since 2005, Michael has been a librarian at National Geographic.

About the Blog

Researchers, conservationists, and others share stories, insights and ideas about Our Changing Planet, Wildlife & Wild Spaces, and The Human Journey. More than 50,000 comments have been added to 10,000 posts. Explore the list alongside to dive deeper into some of the most popular categories of the National Geographic Society’s conversation platform Voices.

Opinions are those of the blogger and/or the blogger’s organization, and not necessarily those of the National Geographic Society. Posters of blogs and comments are required to observe National Geographic’s community rules and other terms of service.

Voices director: David Braun (dbraun@ngs.org)

Social Media