Connections with nature are linked to happiness and creativity. And yet, research suggests that physicians of the past were on to something. A number of recent studies show that not only can nature make us happier, but it can also boost creativity, brain function, and physical health. Beautiful vistas and outdoor fun impact your brain in real ways, and the latest research is finally cracking exactly how—which means you're just trails away from becoming a better thinker.

How Nature Boosts Your Happiness

Until recently, we mostly just had anecdotal evidence to suggest that nature is good for us. That’s all changed with neuroscience; brain scans indicate that nature doesn’t just alter the way we feel subjectively, but it also impacts our brain. Stanford’s Gregory Bratman published a paper with his colleagues in the Proceedings of the National Academy of Sciences about the changes in the brain that occur when people walk in nature.

In his study, he performed brain scans of 38 individuals to obtain a baseline. He also asked participants to answer a questionnaire designed to measure their tendency toward rumination, a pattern of negative thinking. Then, half of the study participants were directed to walk for 90 minutes through a natural California setting, and the other half were instructed to walk along a busy road. 

After the walk, the scan was repeated and the subjects were asked to fill out the questionnaire again. The results showed that people who had walked in nature ruminated less than the urban walkers and showed decreased activity in the subgenual prefrontal cortex, an area of the brain linked to risk for mental illness. Bratman suggests that these results make a strong case for getting outdoors if you want an immediate, easy mood boost.

How Nature Inspires Creativity

Today, we live with ubiquitous technology designed to constantly pull for our attention. But many scientists believe our brains were not made for this kind of information bombardment, and that it can lead to mental fatigue, overwhelm, and burnout, requiring “attention restoration” to get back to a normal, healthy state.

Strayer is one of those researchers. He believes that being in nature restores depleted attention circuits, which can then help us be more open to creativity and problem-solving.

“When you use your cell phone to talk, text, shoot photos, or whatever else you can do with your cell phone, you’re tapping the prefrontal cortex and causing reductions in cognitive resources,” he says.

In a 2012 study, he and his colleagues showed that hikers on a four-day backpacking trip could solve significantly more puzzles requiring creativity when compared to a control group of people waiting to take the same hike—in fact, 47 percent more. Although other factors may account for his results—for example, the exercise or the camaraderie of being out together—prior studies have suggested that nature itself may play an important role. One in Psychological Science found that the impact of nature on attention restoration is what accounted for improved scores on cognitive tests for the study participants.

This phenomenon may be due to differences in brain activation when viewing natural scenes versus more built-up scenes—even for those who normally live in an urban environment. In a recent study conducted by Peter Aspinall at Heriot-Watt University, Edinburgh, and colleagues, participants who had their brains monitored continuously using mobile electroencephalogram (EEG) while they walked through an urban green space had brain EEG readings indicating lower frustration, engagement, and arousal, and higher meditation levels while in the green area, and higher engagement levels when moving out of the green area. This lower engagement and arousal may be what allows for attention restoration, encouraging a more open, meditative mindset.

It’s this kind of brain activity—sometimes referred to as “the brain default network”—that is tied to creative thinking, says Strayer. He is currently repeating his earlier 2012 study with a new group of hikers and recording their EEG activity and salivary cortisol levels before, during, and after a three-day hike. Early analyses of EEG readings support the theory that hiking in nature seems to rest people’s attention networks and to engage their default networks.

Strayer and colleagues are also specifically looking at the effects of technology by monitoring people’s EEG readings while they walk in an arboretum, either while talking on their cell phone or not. So far, they’ve found that participants with cell phones appear to have EEG readings consistent with attention overload, and can recall only half as many details of the arboretum they just passed through, compared to those who were not on a cell phone.

Though Strayer’s findings are preliminary, they are consistent with other people’s findings on the importance of nature to attention restoration and creativity.

“If you’ve been using your brain to multitask—as most of us do most of the day—and then you set that aside and go on a walk, without all of the gadgets, you’ve let the prefrontal cortex recover,” says Strayer. “And that’s when we see these bursts in creativity, problem-solving, and feelings of well-being.”

With all of these benefits to being out in nature, it’s probably no surprise that something about nature makes us feel more alive and vital. Being outdoors gives us energy, makes us happier, helps us to relieve the everyday stresses of our overscheduled lives, opens the door to creativity, and helps us to be kind to others.

No one knows if there is an ideal amount of nature exposure, though Strayer says that longtime backpackers suggest a minimum of three days to really unplug from our everyday lives. Nor can anyone say for sure how nature compares to other forms of stress relief or attention restoration, such as sleep or meditation. Both Strayer and Bratman say we need a lot more careful research to tease out these effects before we come to any definitive conclusions.

Still, the research does suggest there’s something about nature that keeps us psychologically healthy, and that’s good to know…especially since nature is a resource that’s free and that many of us can access by just walking outside our door. Results like these should encourage us as a society to consider more carefully how we preserve our wilderness spaces and our urban parks.