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Lidar Reveals Hundreds of Long-lost Maya and Olmec Ceremonial Centers

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Enlarge (credit: 21st Century Fox)

An airborne lidar survey recently revealed hundreds of long-lost Maya and Olmec ceremonial sites in southern Mexico. The 32,800-square-mile area was surveyed by the Mexican Instituto Nacional de Estadistica y Geografia, which made the data public. When University of Arizona archaeologist Takeshi Inomata and his colleagues examined the area, which spans the Olmec heartland along the Bay of Campeche and the western Maya Lowlands just north of the Guatemalan border, they identified the outlines of 478 ceremonial sites that had been mostly hidden beneath vegetation or were simply too large to recognize from the ground.

“It was unthinkable to study an area this large until a few years ago,” said Inomata. “Publicly available lidar is transforming archaeology.”

Over the last several years, lidar surveys have revealed tens of thousands of irrigation channels, causeways, and fortresses across Maya territory, which now spans the borders of Mexico, Guatemala, and Belize. Infrared beams can penetrate dense foliage to measure the height of the ground, which often reveals features like long-abandoned canals or plazas. The results have shown that Maya civilization was more extensive, and more densely populated, than we previously realized.

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Original Post: arstechnica.com

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Omnitrak’s National City Pride Survey Uncancels Top Metro Destinations

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New York Ranks #1, Followed by San Diego, Los Angeles, Nashville, Seattle; Urban Life Reconstitutes New Communities, Including Cats and Dogs

(PRWeb February 18, 2022)

Read the full story at https://www.prweb.com/releases/omnitraks_national_city_pride_survey_uncancels_top_metro_destinations/prweb18505132.htm

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First-Ever App-based Platform for Men’s Health Now Available In…

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Bastion Health, the first-ever comprehensive app-based telehealth platform for men’s health specializing in reproductive and prostate health, is now available to Florida residents.

(PRWeb January 13, 2022)

Read the full story at https://www.prweb.com/releases/2022/1/prweb18422689.htm

Source Here: prweb.com

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Ships From 1,581 Ports May Go to Antarctica, Bringing Unwanted Guests

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Enlarge / Tourist boats could potentially bring invasive species to the Antarctic region. (credit: Andrew Peacock)

Right now, the Antarctic and the waters around it are surprisingly free of invasive species. According to new research, however, that situation might change in the not-too-distant future, thanks to a shocking level of connectivity with ports across the world. Ships can accidentally carry a large array of marine life, which can in turn colonize new places (like the world’s polar south), outcompete native life, and generally wreak havoc on an ecosystem. New research has traced the paths of the various research vessels, tourist ships, and fishing boats that chug along through the icy waters of the Antarctic.

According to Arlie McCarthy, a researcher in the University of Cambridge’s Department of Zoology and the British Antarctic Survey, these watercraft all carry with them a risk of unwanted visitors. And the visitors may have more chances to relocate than we once thought.

“We know from other cold areas in the world, including the Arctic, that things growing on the hulls of ships absolutely do get transported from place to place, and it is one of the major sources of marine introductions around the world,” McCarthy told Ars. “We also know that ships going into Antarctica do have things growing on them. What we didn’t know until this point was good detail on where those ships go.”

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Original Post: arstechnica.com

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