The skeptic will say that this prescription is at best problematic, given the rate at which we're destroying nature, and the skeptic will be right. This is why the Nature Principle is about conservation but also about restoring ourselves while we restore nature; about bringing back natural habitats where they once existed or creating them where they never were—in our homes, workplaces, cities, and suburbs. It's about the power of living in nature—not with it but in it.

The more high-tech our lives become, the more nature we need.

MANY OF US DESIRE a fuller life of the senses. We city dwellers marvel at the seemingly super­human or supernatural abilities of "primitive" peoples like the Australian Aborigines but consider those talents vestigial, like that remnant tailbone. Here's another view: such senses are in fact latent in all of us, blanketed by noise and faulty assumptions.

Ever wonder why you have two nostrils? Researchers at the University of California at Berkeley did. They fitted undergraduates with taped-over goggles, earmuffs, and work gloves to block other senses, then set them loose in a field. Most of the students could follow a 30-foot-long trail of chocolate perfume and even changed direction precisely where the invisible path took a turn. The subjects were able to smell better with two functioning nostrils, which researchers likened to hearing in stereo. And they found themselves zigzagging, a technique employed by dogs as they track. "We found that not only are humans capable of scent tracking," said study researcher Noam Sobel, "but they spontaneously mimic the tracking pattern of [other] mammals."

What else can we do that we've forgotten? Scientists who study human perception no longer assume we have only five senses: taste, touch, smell, sight, and hearing. The number now ranges from a conservative 10 to as many as 30, including blood-sugar levels, empty stomach, thirst, and proprio­ception (awareness of our body's position in space). In 2009, researchers at Madrid's University of Alcalá de Henares showed how people, like bats, could identify objects without needing to see them, through the echoes of human tongue clicks. According to the lead researcher, echoes are also perceived through vibrations in ears, tongue, and bones—a refined sense learned through trial and error by some blind people and even sighted individuals. It's all about hearing a world that exists beyond what we normally mistake for silence.

This brings us to the so-called sixth sense, which to some means intuition, to others ESP, and to still others the ability to unconsciously detect danger. In December 2004, as the devastating Asian tsunami approached, Jarawa tribespeople of India's Andaman Islands reportedly sensed sounds from the approaching wave, or some other unusual activity, long before the water struck the shore. They fled to higher ground. The Jarawas used tribal knowledge of nature's warning signs, explained V. R. Rao, director of the Anthro­­pological Survey of India, based in Calcutta. "They got wind of impending danger from biological warning signals, like the cry of birds and change in the behavioral patterns of marine animals." In the Jarawas' case, the sixth sense may be the sum of all the other senses combined with their everyday knowledge of nature.

In separate research, the U.S. military has studied how some soldiers seem to be able to use their latent senses to detect roadside bombs and other hazards. The 18-month study of 800 military personnel found that the best bomb spotters were rural people—those who'd grown up in the woods hunting turkey or deer—as well as those from tough urban neighborhoods, where it's equally important to be alert. "They just seemed to pick up things much better," reported Army Sergeant Major Todd Burnett, who worked on the study for the Pentagon's Joint Improvised Explosive Device Defeat Organization. "They know how to look at the entire environment." And the other enlistees, the ones who'd spent more time with Game Boys or at the mall? They didn't do so well. As Burnett put it, they were focused on the proverbial "screen rather than the whole surrounding."

The explanation may be partly physiological. Australian researchers suggest that the troubling increase in nearsightedness is linked to young people spending less time outdoors, where eyes must focus at longer distances. But more is probably going on here. Good vision, acute hearing, an attuned sense of smell, spatial awareness—all of these abilities could be operating simultaneously. This natural advantage offers practical applications. One is an increased ability to learn; another is an enhanced capability to avoid danger. Still another, perhaps the most important, is the measurement-defying ability to more fully engage in life.