Fall is the perfect time to settle in with a good book for our Executive Editor for Science, Janice Audet. Here she suggests some recent and forthcoming books she finds informative and fascinating.
The fall season shepherds in the beginning of a new school season, a time to begin or resume routines and learn new things. The fall season can also be a time to take stock, become introspective, and prepare for the indoor time ahead. For me it often means I tuck into a corner of the couch with a blanket, a cup of tea, and a book. Whatever the fall season means for you, we have a group of compelling science titles to meet your interest. These books guide us through the natural world, human behavior and the mind, and, if you just need a mental escape, an exploration of space. Open up one of these books and find a new connection with the world.
As the days grow shorter and the sunlight wanes, deciduous plants begin preparations for winter. As I’ve learned from Beronda Montgomery’s forthcoming book, Lessons from Plants, dropping leaves in autumn is a seasonal, energy-saving behavior. To prepare for winter days with less sunlight, plants reduce chlorophyll production for a quieter metabolic state. When the temperature drops and the amount of sunlight declines, the plant’s green pigments recede and other pigment colors emerge. The leaves transform into a fiery display of red and gold before drifting to the ground. The changing colors of the leaves is but one example of plants’ incredible ability to sense their environment. There is so much we can learn from plants on how to engage with our environments and adjust our behaviors accordingly. Just as plants thrive after a period of dormancy, we can also be more resilient if we take time to rest.
Without leaves and stems, humans are left to use our five senses to make sense of the world. One of the most crucial tools is as plain as the nose on our face: our sense of smell. But what does the nose tell the mind? How do we recognize certain scents? In other words, how does your mind know that you smell apple, not pumpkin, pie? If you pause and sniff, you’ll notice that everything around you has a smell. The room has the lingering scent of the last meal you ate, your sneakers have an aroma, and your clothes may smell like laundry detergent or something less pleasant! And to that point, why is smell often thought of as a highly subjective sensation, especially in comparison with vision? The same scent can cause a completely opposite reaction and opinion in two different people. In Smellosophy: What the Nose Tells the Mind, A. S. Barwich explores what the nose knows and asks us to reconsider our individual and collective ideas about the sense of smell. Consider, Barwich explains, that we don’t perceive smells in cognitive isolation. Our nose and our minds respond to contextual cues, as well as physiological and affective states. Would the aroma of garlic be as pleasing at 7 a.m. when you are drinking your coffee, as it would be at 6 p.m. when your stomach is rumbling with hunger for dinner? There is great complexity that underlies how people experience smells, and A. S. Barwich is an excellent guide for us to better understand our perceptions and consider our assumptions.
Our senses also play an important role in our detection of fear. Our ability to smell, see, and hear signs of danger has been carefully honed over time. It all began about 550 million years ago with the evolution of specialized nervous systems in worms. A cocktail of neurochemicals that selectively modulate and coordinate activity led to the worms taking control of responses to life threatening experiences. Whether it’s slithering away or balling up to hide, animals and humans have developed complex behaviors to survive. Dan Blumstein’s The Nature of Fear: Survival Lessons from the Wild shows us how we can learn how to better respond to fearful situations. For example, animal alarm calls offer early warnings about a predator—a cat is coming close. But if those calls become screams, the high-fidelity distortion escalates the warning. Screams may not necessarily be louder in volume, but they sound ‘noisier,’ with rapid amplitude and frequency fluctuations. This is the sound of fear. Through experimental research, Blumstein has found that such nonlinearities, like noise, tap into the human emotion of fear as well. Upon hearing this kind of sound, humans’ eyes widen rapidly and often the heartbeat increases. Horror films and haunted houses have used nonlinear, noisy sounds for years to frighten audiences, and in recent decades, political advertisements have also found them effective when attempting to discredit an opponent. Our biology heeds this noise and then signals the need to make a decision: fight or take flight.
Should we need to flee, we are fortunate that navigation skills are also deeply embedded in our biology. In prehistoric times we learned how to find our way over large distances, to the farthest regions of the planet, and this occurred through recognition of landmarks or from a memory associated with an experience. As Michael Bond writes in From Here to There, “the experience of a place can never be explained in coordinates or in terms of the firing patterns of your spatial neurons; you only really know where you are if you can tell a story about that place or remember how you found your way there.” While lately my navigation has been mostly limited to my local neighborhoods and bike trails, I’ve noticed how freeing it has been to leave the GPS or map apps behind. The spatial representations I carry in mind of these new neighborhoods and trails—the mental maps—are filled with turns in the road, houses with yellow exteriors, and soccer fields. I’ve found some comfort in Bond’s discussion: by navigating without technology’s assistance, I am bolstering my skills and cognitive health. As Bond states, “There is still a world out there to explore, and we need to find a way through it.”
But, if you’re feeling like you want to leave the world behind, I recommend a witty and compelling look at space travel, Christopher Wanjek’s Spacefarers. Most plans for space settlements look good in your imagination, on paper, or in an animated video. But what would it really take to live beyond Earth? On the Moon we would need to solve the problems of no breathable air, no atmospheric pressure, and no protective atmosphere, but it is relatively close to Earth and, as we’ve found, suitable for encampment. The red planet, Mars, is the most earthlike planet in the solar system and has the only other surface suitable for human settlement with our current technologies. But Mars also has no breathable air, little atmospheric pressure, and it would take anywhere from six to nine months to get there. Venus is nearly identical to Earth in air pressure and gravity if one stays above the Venusian clouds, but we may not want to subsist in balloon-lofted cities for the rest of our lives. How about Mercury then? There is unlimited solar energy which could provide for “green” living, but life would need to be subterranean since there are wild temperature fluctuations and a lack of breathable air or atmospheric pressure. Wanjek explores the moons of planets, orbital habitats or islands in the sky, searching among our solar system’s frontier for livable space. While settlements may be currently out of our reach, Wanjek gives us something to marvel at, aspire to, and dream about in the meantime.
Regardless of what this season means for you or where you are this fall, physically and mentally, I wish you rest, resilience, and travels into the far reaches of your mind. The universe is at our fingertips…and between the covers of a book.