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Their "Womb is a Battlefield" Inside the most brutal nursery on Earth, the battle for survival begins before birth. In a dark, liquid arena, the strongest sibling hunts and consumes the weakest.
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Beneath the surface of the world's
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oceans, where sunlight dances and then
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dissolves into the endless blue lies an
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empire far older than any forest, any
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mountain, any animal that ever walked
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the land. Its sentinels are not
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monsters, but marvels. These are the
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guardians of the deep, sharks whose very
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bones remember an earth untouched by
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man. For over 450 million years,
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predating the trees and outlasting the
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thunder lizards, sharks have called the
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seas their home. They arrived before the
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continent split, before birds first
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sang, before the earliest leaves turned
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sunlight into life. When comet fire and
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volcanic fury swept away most of life on
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Earth, sharks endured. When coral reefs
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vanished and returned, when glaciers
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carved new coasts, sharks adapted,
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changed, and survived. They are not
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relics frozen in time, but architects of
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it. The story of sharks is written not
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in raw and rampage, but in the gentle
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touch of evolution's hand. Their bodies
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became sculpted for survival. Skeletons
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made of cartilage, not bone, gifting
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them flexibility and speed. Teeth that
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grow endlessly in neat arrangements,
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falling away and renewing in perfect
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cycles.
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Fins that slice water with the least
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resistance. And a sixth sense attuned to
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nature's subtlest secrets. Despite their
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ancient power, the genius of sharks lies
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not in brute force, but in the art of
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balance. They are patient, deliberate,
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intelligent, alive to the gentle cues
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that signal life and danger in a world
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always shifting. Life for a shark begins
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in mystery. Unlike most of their
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fishkin, sharks have evolved not one but
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three distinct ways to bring forth new
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generations.
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Some, such as the elegant cat shark, lay
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tough, leathery egg cases known to beach
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comrs as mermaids purses.
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These pouches attached to rocks or
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tangled seaweed cradle developing
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embryos for months, protecting them from
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prying mouths and currents until the
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moment is right to break free. Others
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are over viviperous. Their young grow
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inside eggs within the mother's body,
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nourished by yolk sacks, protected from
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both predators and the seas cold
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embrace. At birth, they emerge already
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fully formed, slipping out to join the
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world with no guidance or fanfare.
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Some sharks, masters of evolution, are
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viviperous, giving live birth, not
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unlike mammals. Here, inside the
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mother's body, the young are connected
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by a primitive placenta, sharing
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nutrients and learning the rhythm of her
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heart. Yet even in the womb, the
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struggle for life begins early. In
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several species, the strongest pups will
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consume their yet unborn siblings, a
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lesson in survival taught in the oldest
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classroom of all. After gestation, that
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can last from several months to more
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than 2 years, the longest known among
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any vertebrate.
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Baby sharks or pups arrive in this world
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alone. There is no mother's embrace, no
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learning by example. Each pup equipped
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with millions of years of instinct is
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immediately free and immediately in
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danger. The ocean is a perilous place
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for a young shark.
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Even in the sheltered warm shallows of
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mangro forests and seaggrass beds,
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nature's playgrounds and nurseries, they
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must hide.
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For the shadow overhead may belong to a
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predator, a larger shark or a waiting
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heron.
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In these tangled roots and sundappled
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pools, young sharks begin the quiet
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schooling of survival, stalking tiny
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crustaceans, hunting shrimps and darting
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fish, perfecting the art of stealth.
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From the start, they display skills
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uncanny for their age. Eyes attuned to
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dimness, bodies built for silent
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gliding,
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and extraordinary organs called the
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ampuli of Lorenzini, sensors able to
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read the faintest electric fields given
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off by all living things.
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Even in darkness, a shark can sense the
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beating heart of a hidden prey. Fewer
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than one in 10 young sharks will survive
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their first year, but those that do grow
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and learn fast.
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As they mature, some will remain close
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to coral reefs, weaving between
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branching stagghorn and lurking beneath
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ledges.
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Others like the Mako, the blue shark, or
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the great white will one day set out
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across endless blue deserts, undertaking
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oceans spanning migrations drawn by
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tides, seasons, and a compass written
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into their flesh.
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Sharks live by cycles invisible to us.
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The pull of the moon, currents born on
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distant shores, invisible magnetic maps
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stretching from pole to pole.
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To survive, they must not only hunt, but
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remember where prey gathers, where
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danger lurks, when to leave, when to
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return.
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Many species take a decade or more to
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reach maturity, outliving the patience
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of most who would study them. Their slow
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growing years render them vulnerable to
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any sudden change, over fishing,
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pollution, the loss of precious nursery
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grounds. Forget for a moment the myth of
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the mindless killer. Sharks are
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strategic hunters, supreme in patience
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and observation.
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Each species has adapted a distinct way
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to thrive. The tiger shark is nature's
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recycler. Unpicky and thorough, sweeping
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up turtles, seabirds, and on occasion
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the refues of human civilization,
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the great white prefers stealth,
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circling far below the surface, then
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erupting upwards in a single powerful
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ambush. The gentle whale shark filters
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vast clouds of plankton, ingesting more
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water than an Olympic swimmer in an
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hour. The hammerhead with its wide
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flattened head finds stingrays by
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reading their electric fields then pins
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them flat against the sand. Sharks are
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neither glutton nor wasteful. After a
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large meal, many will not eat for days
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or weeks, gradually digesting food in a
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slow, efficient process unmatched
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elsewhere in nature. To understand a
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shark's preferences, we must imagine a
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world painted in sensation.
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Their eyes see not only in the near
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dark, but in colors most fish cannot
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detect. Do sharks sleep? It depends on
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the species. Others, like nurse sharks,
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settle on the bottom and pump water
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methodically, suspended in a light doze,
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always listening to the vibrations of
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the outside world.
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As the years pass and sharks reach
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maturity, the call to mate shapes their
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journey. Courtship is a complex, often
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turbulent affair. Males lacking hands
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use their teeth to hold females, their
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bites more an embrace than an attack.
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When birth comes, it is solitary and
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unceremonious.
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The mother finds a sheltered cove, a
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bay, or a cradle of tangled mangrove
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roots and brings forth her pups, then
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disappears. There is no teaching, no
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guarding, only instinct, the ancient
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thread running unbroken through
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millennia.
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Modern science has only begun to pierce
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the veil of their mysteries. Some
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species, like the Greenland shark, glide
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slowly through Arctic depths, living for
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over four centuries, longer than any
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known vertebrate. Others traverse the
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world, returning impossibly to the very
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same shores where they were born decades
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before. They learn, they remember, they
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exhibit curiosity and caution, skills
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once thought too complex for a primitive
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fish. For centuries, humans have feared
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sharks, painted them as villains in
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tales and films, hunted them with
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vengeance, misunderstood their silence.
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Yet a world without sharks is one on the
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brink. Every year, over a 100 million
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are killed, mostly for their fins. Their
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absence sends reefs into chaos. Prey
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populations saw and the very lungs of
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the planet. The oceans themselves gasp
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and shrink. To save sharks is not merely
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to preserve a single species or even a
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family of fishes. It is to safeguard the
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ancient cycles that have shaped ocean
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life and through it human life. In the
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silent blue she moves. A creature
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ancient and unhurried. With the wisdom
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of ages, writ in every line, she asks
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for nothing but balance. She takes only
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what she needs, leaving the rest to
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thrive. The misunderstood guardians of
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the deep invite us to understand not
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just themselves, but the web of life
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they uphold. A story as old as time, as
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vital as breath itself. For in
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understanding sharks, we begin to
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understand our own future, bound forever
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to the rhythm and survival of the sea.
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