The Marginalian
The Marginalian

Grace Against Gravity and the Physics of Vulnerability: How Birds Fly and Why They Flock in a V Formation

Grace Against Gravity and the Physics of Vulnerability: How Birds Fly and Why They Flock in a V Formation

“What we see from the air is so simple and beautiful,” Georgia O’Keeffe wrote after her first airplane flight, “I cannot help feeling that it would do something wonderful for the human race — rid it of much smallness and pettiness if more people flew.”

I am writing this aboard an airplane. An earthbound ape in my airborne cage of metal and glass, I wonder who we would be, in the soul of the species, if we could fly — really fly, the way birds do; if we were born not just seeing “the world all simplified and beautiful and clear-cut in patterns,” as Georgia did out of that small round window, but feeling it. And yet you and I shall never know the open sky as a way of being — never know the touch of a thermal or the taste of a thundercloud, never see our naked shadow on a mountain or slice a cirrus with a wing. What cruel cosmic fate to live on this Pale Blue Dot without ever knowing its blueness. And yet we are recompensed by a consciousness capable of wonder — that edge state on the rim of understanding, where the mind touches mystery.

It is wonder that led us to invent science — that quickening of curiosity driving every discovery — so that science may repay us with magnified wonder as it reveals the weft and warp of nature — the tapestry of forces and phenomena, of subtleties and complexities, woven on the enchanted loom of reality. To look at any single thread more closely, in all its hidden wonder, is to see more clearly how the entire tapestry holds together, to strengthen how we ourselves hold together across the arc of life. For, as Rachel Carson so memorably wrote, the greatest gift you could give a child — or the eternal child in you — is “a sense of wonder so indestructible that it would last throughout life, as an unfailing antidote against the boredom and disenchantments… the sterile preoccupation with things that are artificial, the alienation from the sources of our strength.”

Art by Nikki McClure from Something About the Sky — Rachel Carson’s serenade to the wonder of the clouds

Take the wonder of a bird — this living poem of feather and physics, of barometric wizardry and hollow bone, in whose profoundly other brain evolution invented dreams. That so tiny a creature should defy the gravitational pull of an entire planet seems impossible, miraculous. And yet beneath this defiance is an active surrender to the same immutable laws that make the whole miracle of the universe possible.

In one of the three dozen fascinating essays collected in The Miraculous from the Material: Understanding the Wonders of Nature (public library), the poetic physicist and novelist Alan Lightman illuminates the lawful wonder of avian flight, from evolution to aerodynamics, from molecules to mathematics, beginning with the fundamental wonderment of how a bird creates strong enough an upward force to counter gravity’s pull on its weight:

[The force] is created by a net upward air pressure, which in turn is created by the bird’s forward motion and the shape of its wings. The topside of an avian wing is curved, while the bottom side is rather flat. This difference in shape, together with the angle and some smaller adjustments of the wing, cause the air to flow over the top of the wing at higher speed than on the bottom. The higher speed on top reduces the air pressure above the wing compared to the air pressure below the wing. With more pressure pushing up from below than pressure pushing down from above, the wing gets an upward lift.

Anatomy of a bird by French artist Paul Sougy. (Available as a print, benefitting The Nature Conservancy.)

It may seem counterintuitive that a higher air speed above the wing would produce a lower pressure, but our creaturely intuitions have often been poor reflections of reality — it took us eons to discern that the flat surface beneath our feet is a sphere, that the sphere is not at the center of the universe, and that there is an invisible force acting on objects without touching them to make the universe cohere — a force which a bored twenty-something sitting in his mother’s apple orchard called gravity.

Alan explains the reality of chemistry and physics that makes flight possible as air molecules strike against the underside of the wing to lift the bird up:

Air consists of little molecules that push against whatever they strike, causing pressure. Molecules of air are constantly whizzing about in all directions. If no energy is added, the total speed of the molecules must be constant, by the law of the conservation of energy. But that speed is composed of two parts: a horizontal speed, parallel to the wing, and a vertical speed, perpendicular to the wing. Increase the horizontal speed of air molecules above the wing, and the vertical speed of those molecules must decrease. Lower speed of molecules striking the wing from above means less pressure, or less push. The molecules on the bottom of the wing, moving slower in the horizontal direction but faster in the vertical direction (with greater upward pressure), lift the wing upward.

The lift is greater the larger the wing area and the faster the speed of air past the wing. There’s a convenient trade-off here. The necessary lift force to counterbalance the bird’s weight can be had with less wing area if the animal increases its forward speed, and vice versa. Birds capitalize on this option according to their individual needs. The great blue heron, for example, has long, slender legs for wading and must fly slowly so as not to break them on landing. Consequently, herons have relatively large wingspan. Pheasants, on the other hand, maneuver in underbrush and would find large wings cumbersome. To remain airborne with their relatively short and stubby wings, pheasants must fly fast.

Art from An Almanac of Birds: Divinations for Uncertain Days. (Available as a print and as stationery cards, benefitting the Audubon Society.)

There are, however, limits to this factorial conversation between surface and speed. Alan considers why there are no birds the size of elephants:

As you scale up the size of a bird or any material thing, unless you drastically change its shape, its weight increases faster than its area. Weight is proportional to volume, or length times length times length, while area is proportional to length times length. Double the length, and the weight is eight times larger, while the area is only four times larger. For example, if you have a cube of 1 inch on a side, its volume is 1 cubic inch, while its total area is 6 (sides) × 1 square inch, or 6 square inches. If you double the side of the cube to 2 inches, its volume goes up to 8 cubic inches, or 800 percent (with a similar increase in weight), while its area goes up to 24 square inches, or 400 percent. Since the lift force is proportional to the wing area while the opposing weight force is proportional to the bird’s volume, as you continue scaling up, eventually you reach a point where the bird’s wing area is not enough to keep it aloft. Although birds have been experimenting with flight for 100 million years, the heaviest true flying bird, the great bustard, rarely exceeds 42 pounds. The larger gliding birds, such as vultures, are lifted by rising hot air columns and don’t carry their full weight.

But all this elaborate molecular and mathematical aerodynamics of upward motion is not enough to make flight possible — birds must also propel themselves forward without propellers. For a long time, how they do this was a mystery. (The mystery was even deeper for the singular flight of the hummingbird, hovering between science and magic.) It was the birth of modern aviation that finally shed light on it. In the early nineteenth century, watching how birds glide, the pioneering engineer and aerial investigator George Cayley became the first human being to discern the mechanics of flight, identifying the three forces acting on the weight of any flying body: lift, drag, and thrust.

Art by Keizaburō Tejima from Swan Sky

Alan details the physics of drag and thrust that allow birds to move forward:

Birds do in fact have propellers, in the form of specially designed feathers in the outer halves of their wings. These feathers, called primaries, change their shape and position during a wingbeat. Forward thrust is obtained by pushing air backward with each flap. In a similar manner, we are able to move forward in a swimming pool by vigorously moving our arms backward against the water.

All of this helps explain why larger birds often fly in a V formation — each bird benefits from the uplifting air pockets produced by the bird in front of it, conserving 20 to 30 percent of the calories needed for flight compared to flying solo. Because the lead bird takes most of the aerodynamic and caloric brunt shielding the rest from the wind, the flock takes turns in the frontmost position.

This, too, is the physics of any healthy community, any healthy relationship — the physics of vulnerability and trust. Because life always exerts different pressures on each person at different times, internal or external, thriving together is not a matter of always pulling equal weight but of accommodating the ebb and flow of one another’s vulnerability, each trusting the other to shield them in times of depletion, then doing the shielding when replenished. One measure of love may be the willingness to be the lead bird shielding someone dear in their time of struggle, lifting up their wings with your stubborn presence.

Art from An Almanac of Birds: Divinations for Uncertain Days. (Available as a print and as stationery cards, benefitting the Audubon Society.)

Couple this fragment of The Miraculous from the Material — the rest of which explores the science behind wonders like fireflies and eclipses, hummingbirds and Saturn’s rings — with the peregrine falcon as a way of seeing and a state of being, the enchanting otherness of what it’s like to be an owl, and the science of what birds dream about.

BP

The Heroes Among Us: John Berger on the Courage to Create

The Heroes Among Us: John Berger on the Courage to Create

“What makes Heroic?” asked Nietzsche as he was emerging from depression, then answered: “To face simultaneously one’s greatest suffering and one’s highest hope.” That is the heroism of the inner world, yes, but what makes a person heroic in the world we share is to face the greatest suffering — their own and the world’s — then make of it a found of hope and fulcrum of strength for others. Heroes are transmutation agents — people who alchemize suffering and restlessness and rage into love, who compost disappointment into fertilizer for growth, who break down cynicism to its building blocks of helplessness and hubris, then metabolize the toxin out of the system we call society.

There are myriad kinds of heroes capable of myriad heroisms — the epochal heroisms of speaking truth to power that mobilize the consciousness of a civilization and the small daily heroisms of the invisible labor that makes the world cohere, the heroism of planting a tree and the heroism of abolishing a plantation, the heroism of keeping faith in a friend through a hard time and the heroism of leaving a false love.

It helps to remember this diversity of heroisms, because it saves us from imprisoning our heroes in the expectation that everyone contribute to the shared cause — the great project of human flourishing — in the same way. The protest marcher and the poet are very different kinds of heroes, and it is an act of oppression against the gift of each to measure them on the register of the other. Only when we cease doing that can we begin to recognize the heroes who across the history of every civilization have kept the lighthouse blazing through the dark times — the heroes we call artists.

The Star-Lighter by Rockwell Kent, 1919. (Available as a print and as stationery cards.)

These are the heroes John Berger (November 5, 1926–January 2, 2017) celebrates in one of the essays in his 1991 collection Keeping a Rendezvous (public library) — the heroes we need in times “when the just cause is defeated… when our past is dishonoured and its promises and sacrifices shrugged off with ignorant and evil smiles, when whole families come to suspect that those who wield power are deaf to reason and every plea, and that there is no appeal anywhere, when gradually you realize… that They are out to break you, out to break your inheritance, your skills, your communities, your poetry, your clubs, your home and, wherever possible, your bones too.” Of such times, Berger writes:

The avenging heroes are now being dreamt up and awaited. They are already feared by the pitiless and blessed by me and maybe by you.

I would shield any such hero to my fullest capacity. Yet if, during the time I was sheltering him, he told me he liked drawing, or… she told me she’d always wanted to paint, and had never had the chance or the time to do so, if this happened, then I think I’d say: Look, if you want to, it’s possible you may achieve what you are setting out to do in another way, a way less likely to fall out on your comrades and less open to confusion.

Art by Giuliano Cucco from Before I Grew Up — a lyrical picture-book about the artist within

Echoing Iris Murdoch’s abiding observation that “tyrants always fear art because tyrants want to mystify while art tends to clarify” and Auden’s insistence that “the mere making of a work of art is itself a political act,” Berger adds:

I can’t tell you what art does and how it does it, but I know that often art has judged the judges, pleaded revenge to the innocent and shown to the future what the past suffered, so that it has never been forgotten. I know too that the powerful fear art, whatever its form, when it does this, and that amongst the people such art sometimes runs like a rumour and a legend because it makes sense of what life’s brutalities cannot, a sense that unites us, for it is inseparable from a justice at last. Art, when it functions like this, becomes a meeting-place of the invisible, the irreducible, the enduring, guts, and honour.

Complement with Leonard Cohen on what makes a modern saint, James Baldwin on the artist’s role in society, Toni Morrison on the artist’s task in troubled times, and Ernst Becker on heroism and our search for meaning, then revisit Berger on the power of music.

BP

Kafka on Friendship and the Art of Reconnection

Kafka on Friendship and the Art of Reconnection

Among the paradoxes of friendship is this: All friendships of depth and durability are based on a profound knowledge of each other, of the soul beneath the costume of personality — that lovely Celtic notion of anam cara. We bring this knowledge, this mutual understanding, to every interaction with a true friend — that is what makes friendship satisfying, steadying, safe; it is what makes it, in Kahlil Gibran’s immortal words, a “field which you sow with love and reap with thanksgiving.” And yet, if we are alive enough, each time we meet we are meeting for the first time, getting to know each other afresh, for only the self that goes on changing goes on living. A true friend blesses both the abiding and the possible in us.

Another paradox: It is often the loneliest people, those most riven by self-doubt and most unsure of where they belong, that make the most steadfast and salutary friends once they break through the barriers of insecurity and fear to allow connection. Because for them the gift of being understood is especially hard-earned, they give it back redoubled with gratitude.

Franz Kafka (July 3, 1883–June 3, 1924) was one such person.

Franz Kafka

“Am I broken?” he asks on the pages of Diaries: 1910–1923 (public library) — the journal in which he grappled so desperately with self-doubt — and answers himself: “Almost nothing but hope speaks against it.” When his hope dwindled, he declared himself “unfit for friendship,” doubted whether friendship is “even possible” for someone as strange and solitary as himself, and yet he yearned for it: “I am incapable, alone, of bearing the assault of my own life, the demands of my own person.”

In a particularly dispirited diary entry from the last year of his thirties, which was also one of the last years of his life, he declares himself “forsaken” and writes:

[I am] incapable of striking up a friendship with anyone, incapable of tolerating a friendship, at bottom full of endless astonishment when I see a group of people cheerfully assembled together.

It takes just one unwavering friend — a friend to the soul beneath the self that does the doubting — to quietly and consistently revise these punishing stories we tell ourselves. All along, through all the years of all this punishing self-talk, Kafka’s childhood friend Max Brod had been the greatest champion of his talent, never losing faith in his friend or in the friendship. Though Kafka frequently withdrew into his self-elected isolation, Max never withdrew his love.

Art by Marianne Dubuc from The Lion and the Bird — a tender illustrated story about loyalty and the gift of friendship

With time, Kafka came to understand that in every friendship, life happens and interrupts the continuity of connection, making it difficult to reconnect — difficult but infinitely important, for in moving through the difficulty of discontinuity, in the repair of the rupture, the deeper substratum of trust and durability is laid down and reaffirmed again and again.

In another diary entry, he writes:

Since a friendship without interruption of one’s daily life is unthinkable, a great many of its manifestations are blown away time and again, even if its core remains undamaged. From the undamaged core they are formed anew, but as every such formation requires time, and not everything that is expected succeeds, one can never, even aside from the change in one’s personal moods, pick up again where one left off last time. Out of this, in friendships that have a deep foundation, an uneasiness must arise before every fresh meeting which need not be so great that it is felt as such, but which can disturb one’s conversation and behaviour to such a degree that one is consciously astonished, especially as one is not aware of, or cannot believe, the reason for it.

Like all deep and complex people, Kafka was not fully aware of the reasons for his frequent withdrawals. But some part of him hoped, trusted that true friendship withstands the elasticity of presence. When he finally realized that the tuberculosis he had been living with for years was going to take his life, he left all his papers and manuscripts to Max, instructing him to destroy everything. In an act of love — refusing to enable a friend’s damaging self-doubt is always an act of love — Max disobeyed, instead preserving Kafka’s writing for posterity, publishing a tender biography of his friend, and immortalizing their friendship in his 1928 novel The Kingdom of Love.

Illustration by Maurice Sendak from a vintage ode to friendship by Janice May Udry

Complement with Comet & Star — a cosmic fable about the rhythms and consolations of friendship — and an introvert’s guide to friendship from Thoreau, another strange and solitary person riven by self-doubt, then revisit Kafka on the nature of reality, the power of patience, and the four psychological hindrances that keep the talented from manifesting their talent.

BP

The Dictionary Story: A Love Letter to Language Tucked Into a Delightful Fable about the Difficult Question of How to Be Yourself

The Dictionary Story: A Love Letter to Language Tucked Into a Delightful Fable about the Difficult Question of How to Be Yourself

“Words belong to each other,” Virginia Woolf rasped in the only surviving recording of her voice — a love letter to language as an instrument of thought and a medium of being. “Words are events, they do things, change things,” Ursula K. Le Guin wrote a generation after her. To care about the etymologies of words is to care about the origins of the world’s story about itself. To broaden and deepen the meanings of words, to celebrate — as David Whyte did — “their beautiful hidden and beckoning uncertainty,” is to broaden and deepen life itself. It is of words that we build the two great pylons propping up our sense of reality: concepts and stories. Without the concept of a table, you would be staring blankly at the assemblage of incongruent surfaces and angles. Without arranging the facts and events of your life into a story — that narrative infrastructure of personhood — it would not be you looking out of your eyes. To know yourself is to tell a congruent story of who you are, a story in which your concept of yourself coheres even as it evolves. Without this central organizing principle of selfhood, life would be a continuous identity crisis.

Crisis, of course, is important — it is, as Alain de Botton writes in his deeply assuring meditation on the importance of breakdowns, “an insistent call to rebuild our lives on a more authentic and sincere basis.” There come times when the tedium and turmoil of being yourself become too much to bear, exasperate you, exhaust you, make you wish to be someone else, send you searching for a different organizing principle. (It takes some living to reach that point, which is why midlife can be such a time of tumult and transformation.)

We live and die with these questions, rooted in our earliest childhood, in those first reckonings with what makes us ourselves, those first experiments in self-acceptance. They are deep and difficult questions, but Oliver Jeffers and Sam Winston bring great playfulness and delight to them in their second collaboration, The Dictionary Story (public library) — a charming fable about the yearning for inner congruence and the existential exhale of self-acceptance, and a love letter to language carried by Oliver’s joyful paintings, his singular hand-lettering, and Sam’s symphonic collage compositions.

The story begins on the bookshelf, where “most of the time, all the books knew what they were about” — except one book. Because she contains “all the words that had ever been read, which meant she could say all the things that could ever be said,” Dictionary is perpetually unsure of herself, her organizing principle not coherence but alphabetic order, the words in her not a story but a list.

It is often the most unexpected and improbable things that save us from ourselves: An Alligator suddenly leaps from the A pages and, ravenous for a snack, heads to the D pages for a Donut, who, not wanting to be eaten, darts across the alphabet.

A chaos of delight ensues as other words come alive as other characters — a Ghost, a Cloud, a Queen, a Tornado, the Moon — each trying to understand their part in the confusing story writing itself through their animacy.

Dictionary’s thrill at finally having a story unfold on her pages turns into terror as things get out of hand. Suddenly, her natural order starts to look a whole lot more desirable than this unbridled disarray of characters with incompatible desires. (And who hasn’t felt the discomposing overwhelm of trying to make too many changes to the story of life all at once, to harmonize the discord of conflicting desires, only to end up in even deeper incoherence.)

In the end, Dictionary calls on her friend Alphabet to restore her to herself — a lovely reminder that the greatest gift a friend can give is to sing back to you the song of yourself when you forget it.

Couple The Dictionary Story with Oliver and Sam’s previous collaboration, A Child of Books, then revisit The Dictionary of Obscure Sorrows — John Koenig’s uncommonly wonderful invented words (based on real etymologies from around the world) for what we feel but cannot name, words like maru mori (“the heartbreaking simplicity of ordinary things”) and apolytus (“the moment you realize you are changing as a person”).

BP

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