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DALLAS — Three weeks afore his team’s deposit finds were to go on affectation at one of the world’s best acclaimed accustomed history museums, Louis Jacobs stood in a basement lab at Southern Methodist University sanding the lower jaw of a 72-million-year-old sea monster.

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The Dallas Morning News letters his aide Michael Polcyn sat nearby, dabbing adhesive on a archetypal of the animal’s aerial jaw and skull. White dust hovered in the air. Adhesive tailbones, skulls and teeth topped every counter.

That was the array of assignment — advancing models and fossils — that Jacobs had done aboriginal in his career, afore he became a professor, afore he ter for fossils in Alaska, Antarctica, Malawi, Cameroon and Texas; afore he dug up the basic of dinosaurs on affectation at the Perot Building of Nature and Science in Dallas; afore he wrote three books and dozens of peer-reviewed papers.

Now Jacobs, 70, in baby ellipsoidal glasses, his bouncing white beard disarrayed, looks out of abode in a lab covering and assignment gloves, and Polcyn pokes fun at him.

“Because of the way I came into paleontology, I didn’t accept a agents like this guy,” says Polcyn, a self-taught archaeologian who helped body and advertise a telecommunications aggregation afore he aing the agents at SMU. Polcyn adds that Jacobs did added deposit assignment aback he was younger.

“Before I grew old and lazy,” jokes Jacobs, and the two laugh.

Then Polcyn turns serious. “We’ve never put an affectation of this calibration together,” he says.

Jacobs and Polcyn, forth with a baby assembly of staff, acceptance and volunteers, had been alive endlessly for months accepting accessible for the better appearance of their careers. Aing door, volunteers cascade bronze-colored molds of teeth and aperture that visitors will touch. One attic up, colleagues band acrylic cases with atramentous acquainted to beanbag and affectation $.25 of bill and vertebra like design rings in a adornment store.

In a amount of canicule the aggregation would backpack its accomplishment into a busy barter and drive it 1,300 afar to the Smithsonian Civic Building of Accustomed History in Washington, D.C. Soon the museum’s “Sea Monsters Unearthed” affectation will advertise fossils that Polcyn, Jacobs and an all-embracing aggregation of scientists begin forth the littoral cliffs of Angola in West Africa amid 2005 and 2016. The finds date from about 88 actor to about 72 actor years ago, starting afterwards Africa and South America drifted afar and opened the southern Atlantic Ocean.

Among the animals they apparent were barbaric sea creatures, some with connected necks and paddle-like legs, aerial reptiles, 3-foot-long oysters and aished breed of whales.

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Their adventure was to apprentice about the aboriginal life-forms that confused into the South Atlantic, to trace how they adapted and how the acreage connected to change about them. The clues they baldheaded acquaint the adventure of how our planet shapes the creatures that abide it — including us — and links aback to Texas’ own aged past.

Jacobs likens paleontology to detective assignment that targets the ample questions of animal existence. “It explains a lot about apple and life,” he says, “and we don’t accept abundant else.”

Jacobs grew up in a aggressive ancestors that confused frequently. Everywhere he lived, he spent time exploring the outdoors. As a sixth grader in Bryan, Texas, he befriended a neighbor, a retired geologist, who took him deposit hunting and accomplished him how to backpack a mule for connected expeditions. The acquaintance spawned a constant absorption in rocks, animals and evolution.

Before Jacobs grew absorbed by 30-foot-long African sea lizards, he advised artifacts that were far smaller: rodent teeth.

As a alum apprentice at the University of Arizona, Jacobs formed in the southern foothills of the Himalayas in Pakistan coursing bank and bedrock to acquisition basic almost arresting to the naked eye. Because rodents are assorted and advance quickly, scientists accept acclimated their teeth to date rocks.

“Have you anytime apparent one?” he asks, sitting on this day in his appointment in jeans and a checkerboard shirt.

He starts ambiguity affidavit on his desk, slapping them with his easily to feel for a cast.

“Where’s your rat tooth aback you charge it?” he says.

Jacobs stands up and active to a lab, breadth he finds a molar cast, places it below a microscope and adjusts the focus.

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“You see how appealing it is?” he asks.

He credibility out how the cusps in the tooth anatomy three rows of little backward Vs. Scientists use patterns in those Vs to acquaint rodent breed apart.

To Jacobs, all fossils are beautiful. “It’s the architectonics of life,” he says. “And it looks good.”

After alum school, Jacobs took his aboriginal cruise through Africa and met the anthropologist Richard Leakey. Leakey, afresh administrator of the Civic Building of Kenya, assassin Jacobs to arch its analysis of paleontology, which housed the Leakey family’s battleground finds of animal antecedent fossils.

For two years Jacobs lived in Nairobi with his wife, Bonnie, arch dignitaries through the museum’s collections. Giraffes aching alfresco the windows of their burghal home.

Jacobs had consistently been absorbed by Africa. Its appeal, he wrote in one of his books, was not clashing that of dinosaurs. To outsiders, it seemed exciting, aberrant and possibly sinister.

“Every greenhorn who has anytime gone to Africa has taken a allotment of it abroad and larboard article behind,” he wrote in “Quest for the African Dinosaurs” in 1993. Jacobs capital to leave abaft article beneficial, consistently abiding fossils to the countries breadth he had begin them, training their alum acceptance and allowance authorize museums.

He alternate to the abstemious afresh and again.

In the 1980s and ’90s, he led expeditions to the tiny East African country of Malawi and aing expeditions to Cameroon. In Malawi, his aggregation begin a accession of long-necked plant-eating dinosaurs and traced their ancestors all the way to Texas’ Big Bend Civic Park. Both long-necked breed — the Texan and the Malawian — now approach over visitors at the Perot Museum.

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Jacobs’ aide Polcyn, who specializes in aished lizards alleged mosasaurs, was a active force abaft the contempo expeditions to Angola.

In 1999, Polcyn and Jacobs declared the oldest mosasaur accustomed to science, which Polcyn had apparent on a cruise to Israel.

As the men blab the story, a advance with them expresses surprise.

“You didn’t apperceive that?” asks Jacobs about their 98-million-year-old find. “What, were you tellin’ all your accompany that we were aloof a agglomeration o’ rubes?” Everyone laughs.

Like whales, mosasaurs started out as acreage creatures, afresh traded their limbs for fins afterwards demography up abode in the ocean. Already dinosaurs asleep in a 66-million-year-old asteroid strike, some mosasaur cousins survived and acquired into a adviser lizards.

In their abyssal days, mosasaurs acquired connected snouts and ample appendage fins like dolphins and whales. But Jacobs credibility out that a key aberration amid mosasaurs and whales lies in how they classy their tails. Mosasaurs waggle their bodies side-to-side as they swim, aloof as lizards move side-to-side as they walk. Whales, however, accept spines that angle up and bottomward like their acreage mammal relatives, and their cape move up and bottomward as well.

Jacobs and Polcyn accept additionally advised mosasaurs, sea turtles and plesiosaurs, abyssal reptiles on which the fable of the Loch Ness monster is based, throughout North Texas. They date from amid 96 actor and 70 actor years ago, aback our breadth lay below a ample civil sea (see map).

Now they capital to acquisition out what happened to abyssal reptiles as the southern Atlantic Ocean began to accessible about 120 actor years ago, aback the southern supercontinent of Gondwana breach into what is now Africa and South America, aing the South Atlantic Ocean with the arctic oceans about 90 actor years ago.

They chose Angola because scientists had apparent an aboriginal mosasaur breed forth its bank in the aboriginal 1960s.

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“We capital to apperceive what happened aback you put a new ocean breadth there wasn’t one before,” said Jacobs.

He explains that the approach of bowl tectonics — the abstraction that continents sit aloft plates that are consistently alive — wasn’t accustomed until the mid-1960s, afterwards Angola’s war for ability bankrupt out and blocked scientists from accomplishing acreage assignment there.

Jacobs and his colleagues were the aboriginal paleontologists to analyze Angola through the lens of continental drift.

Once they accomplished their acreage bivouac in Angola in 2005, breadth arid bluffs formed terraces that descended to the ocean, they begin deposit abundance above what they had imagined.

“It was like a building in the ground,” said Jacobs.

Old basic emerged from the Apple like dust on a beach.

Inspecting a hillside in 2006, Polcyn noticed some base afraid out of a rock. It angry into one of the expedition’s better finds and forms the centerpiece of “Sea Monsters Unearthed”: a ample mosasaur with three partially digested mosasaurs in its belly.

The aggregation biconcave the hillside, encapsulating the fossils in careful adhesive jackets, and loaded its capacity assimilate a alembic address to Houston for its overland adventure to SMU.

Polcyn and his aggregation acclimated a aggregate of laser-scanning and 3D press forth with acceptable mold-making and casting to body a 23-foot-long archetypal of the ample mosasaur’s skeleton. He and colleagues additionally produced a casting of the acreage armpit so visitors could see how the basic looked aback they were still in the ground. While Polcyn can’t say how the predator died, the affirmation shows that already it fell to the basal of the sea, sharks and added fishes scavenged it, abrogation admonition tooth marks on its bones.

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As the aggregation connected to dig, they unearthed added than a dozen new species, and a unified account of sea monster change began to booty shape.

Mosasaurs acquired from almost baby land-dwelling lizards that entered the oceans about 100 actor years ago, during a time of acute all-around abating and aerial sea levels. They advance through the world’s oceans and migrated into the South Atlantic afterwards it opened, about 88 actor years ago. They afresh adapted into the new breed that Jacobs and Polcyn discovered.

“It’s aloof such an important adventure in agreement of how cartography impacts biology,” says Jill Johnson, an exhibition developer and activity administrator at the Smithsonian. “The point is that today things may attending different, but the apple processes are the same.”

The fossil-laden barter from SMU accustomed in D.C. on a Sunday night, apprenticed by one of Jacobs’ above students. The scientists unload it aboriginal the aing morning and absorb the anniversary afore Halloween accumulating plesiosaur paddles, adhering skulls to bodies and installing the affectation abaft bound doors on the Smithsonian’s aboriginal floor.

The show, which will accessible aloof six months afterwards Jacobs’ retirement from SMU, is appropriate to him for abounding reasons. As an educator, he marvels at the Smithsonian’s reach: 7 actor visitors per year, as Jacobs and Polcyn accumulate reminding anniversary other.

It additionally fulfills his mission of giving article of amount aback to Angola. The exhibition will biking to Africa afterwards finishing its run at the Smithsonian in 2020. All the fossils will be alternate to Angola as well.

Perhaps best importantly, it allows bodies to see fossils the way that Jacobs has consistently apparent them: as shards of time that affix bodies to one another, to added active things, and to the planet. They advise us about the earth, allegorize accomplished disruptions, and appearance how changes in altitude and assets may appulse us in the future.

He additionally sees fossils as a point of civic pride.

“You never absolutely attending at your own backyard as actuality an important and absorbing place,” he says. “But the absoluteness is that if you attending at it all as a big, behemothic jigsaw puzzle, afresh every abode is a allotment to that addle and every abode is unique.”

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After a connected day of installing the exhibit, Jacobs and Polcyn airing through the empty, blurred halls of the Smithsonian on their way to dinner. They canyon a 45-foot replica of a bang that hangs aloof alfresco their affectation hall. Aing aperture is the Anteroom of Animal Origins breadth reconstructions of animal ancestors apparent by the Leakeys angle in a group. Scenes from Africa and the ocean beleaguer them.

Sometimes, the stages of a career can assume disparate, like acreage masses amphibian apart. Added times, like continents congregating, it all comes together.

Information from: The Dallas Morning News, http://www.dallasnews.com

This is an AP Member Exchange aggregate by The Dallas Morning News

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