Right now, six people are living in a nearly windowless, white geodesic dome on the slopes of Hawaii's Mauna Loa volcano. They sleep in tiny rooms, use no more than eight minutes of shower time a week and subsist on a diet of freeze-dried, canned or preserved food. When they go outside, they exit through a mock air lock, clad head to toe in simulated spacesuits. The dome's occupants are playing a serious version of the game of pretend — what if we lived on Mars?
Research at the Hawaii Space Exploration Analog and Simulation (HI-SEAS) project, funded in part by NASA, is a continuation of a long history of attempts to understand what will happen to people who travel through outer space for long periods of time. It's more than a technical problem. Besides multistage rockets to propel a spacecraft out of Earth's atmosphere, years of planning and precise calculations and massive amounts of fuel, traveling the tens of millions of miles to Mars will take a tremendous amount of time. With current technology, the journey takes more than eight months each way.
Which means that astronauts will get bored. In fact, a number of scientists say that — of all things — boredom is one of the biggest threats to a manned Mars mission, despite the thrill inherent in visiting another planet. And so, attention is being paid to the effects of boredom at HI-SEAS, and on the International Space Station. But because of the causes of chronic boredom, scientists say, research facilities in Antarctica might actually provide a better simulation of the stress of a journey to Mars.
Most living things constantly seek out sensory stimulation — new smells, tastes, sights, sounds or experiences. Even single-celled amoebas will move to investigate new sources of light or heat, says Sheryl Bishop, who studies human performance in extreme environments at the University of Texas Medical Branch. Animals deprived of naturalistic environments and the mental stimulation that come with them can fall into repetitive, harmful patterns of behavior. Anybody of a certain age will remember zoos full of manically pacing tigers, bears gnawing on their metal cages and birds that groomed themselves bald — all a result, we now know, of their rather unstimulating lifestyles.
Human boredom isn't quite as well understood, says James Danckert, a professor of cognitive neuroscience at the University of Waterloo. He's currently working on what he says may be the first study of how our brain activity changes when we're bored. Danckert is hoping to find out whether boredom is connected to a phenomenon called the "default network" — a background hum of brain activity that seems to remain on even when you aren't directly focused on something. There's a lot of observable activity in the brains of people who are staring at a blank screen — way more than anybody expected, Danckert says. The default network maps closely to the brain-activity patterns scientists see when someone's mind is wandering. It suggests that what we call a restless mind is just that — a mind desperate for something to amuse it, searching frantically for stimulus.
Boredom, it turns out, is a form of stress. Psychologically, it's the mirror image of having too much work to do, says Jason Kring, president of the Society of Human Performance in Extreme Environments, an organization that studies how people live and work in space, underwater, on mountaintops and other high-risk places. If your brain does not receive sufficient stimulus, it might find something else to do — it daydreams, it wanders, it thinks about itself. If this goes on too long, it can affect your mind's normal functioning. Chronic boredom correlates with depression and attention deficits.
Astronaut candidates go through two years of training before they're even approved to fly. And before they are chosen to be candidates, they have to compete against thousands of other applicants. The 2013 class, for instance, had more than 6,000 applicants and only 8 were chosen. Astronauts are rigorously tested for psychological as well as physical fitness. But no mission in NASA's history has raised the specter of chronic boredom to the degree that a Mars mission does, because none have involved such a long journey through nothingness.
Maggie Koerth-Baker is science editor at BoingBoing.net and author of "Before the Lights Go Out," on the future of energy production and consumption.
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