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Dinosaurs and prehistoric life


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#21
Jessica

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Mnyamawamtuka: New dinosaur with heart-shaped tail provides evolutionary clues for African continent

February 13, 2019, Ohio University

 

The OHIO team identified and named the new species of dinosaur in an article published this week in PLOS ONE. The new dinosaur, the third now described from southwestern Tanzania by the NSF-funded team, is yet another member of the large, long-necked titanosaur sauropods. The partial skeleton was recovered from Cretaceous-age (~100 million years ago) rocks exposed in a cliff surface in the western branch of the great East African Rift System.

The new dinosaur is named Mnyamawamtuka moyowamkia (Mm-nya-ma-wah-mm-too-ka mm-oh-yo-wa-mm-key-ah), a name derived from Swahili for "animal of the Mtuka (with) a heart-shaped tail" in reference to the name of the riverbed (Mtuka) in which it was discovered and due to the unique shape of its tail bones.

 


Read more at: https://phys.org/new...ionary.html#jCp

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#22
Sciencerocks

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500-million-year-old worm 'superhighway' discovered in Canada

February 28, 2019, University of Saskatchewan


 

Prehistoric worms populated the sea bed 500 million years ago—evidence that life was active in an environment thought uninhabitable until now, research by the University of Saskatchewan (USask) shows.

 

The sea bed in the deep ocean during the Cambrian period was thought to have been inhospitable to animal life because it lacked enough oxygen to sustain it.

But research published in the scientific journal Geology reveals the existence of fossilized worm tunnels dating back to the Cambrian period 270 million years before the evolution of dinosaurs.

The discovery, by USask professor Brian Pratt, suggests that animal life in the sediment at that time was more widespread than previously thought.

 

 



Read more at: https://phys.org/new...canada.html#jCp

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#23
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Ancient extinct sloth tooth in Belize tells story of creature's last year

February 27, 2019, University of Illinois at Urbana-Champaign


Some 27,000 years ago in central Belize, a giant sloth was thirsty. The region was arid, not like today's steamy jungle. The Last Glacial Maximum had locked up much of Earth's moisture in polar ice caps and glaciers. Water tables in the area were low.

 

The sloth, a beast that stood up to 4 meters tall, eventually found water—in a deep sinkhole with steep walls down to the water. That is where it took its final drink. In 2014, divers found some of the sloth's remains—parts of a tooth, humerus and femur—while searching for ancient Maya artifacts in the pool, in Cara Blanca, Belize.

Though partially fossilized, the tooth still held enough unaltered tissue for stable carbon and oxygen isotope analysis, which provided clues to what the sloth ate in the last year of its life. This, in turn, revealed much about the local climate and environment of the region at the time. The findings, reported in the journal Science Advances, will aid the study of similar fossils in the future, the researchers said.

 



Read more at: https://phys.org/new...belize.html#jCp

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"What is freedom of expression? Without the freedom to offend, it ceases to exist." - Salman Rushdie

 

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#24
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Ancient mammal remains digested by crocodiles reveal new species

March 4, 2019, Zoological Society of London

Capromyid or hutia fossils that were found digested by Cuban crocodiles, found in Queen Elizabeth II Botanic Park, Grand Cayman. Credit: New Mexico Museum of Natural History

Fossilised bones that appear to have been digested by crocodiles in the Cayman Islands have revealed three new species and subspecies of mammal that roamed the island more than 300 years ago.

 

An expert team led by international conservation charity ZSL (Zoological Society of London), the American Museum of Natural History, and the New Mexico Museum of Natural History studied the bones from collections in British and American museums including the Florida Museum of Natural History at the University of Florida. The bones had been previously collected from caves, sinkholes and peat deposits on the Cayman Islands between the 1930s and 1990s.

 

 



Read more at: https://phys.org/new...reveal.html#jCp


#25
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Gigantic T. Rex Skeleton Found in Canada Is Officially World's Biggest

George Dvorsky
Yesterday 2:05pm Filed to: DINOSAURS


Updated measurements of a large fossil found in Saskatchewan nearly 30 years ago confirm it as the world’s largest known Tyrannosaurus rex skeleton. Remarkably, the new work suggests T. rex and other dinosaurs grew to a greater size than is typically appreciated.

New research published last week in The Anatomical Record describes “Scotty,” a T. rex skeleton otherwise known as specimen RSM P2523.8. Scotty is now officially the largest and most aged T. rex ever discovered, and the most gigantic of any of the known two-legged carnivorous dinosaurs known as theropods. At an estimated 19,555 pounds (8,870 kg), it’s also the biggest dinosaur ever discovered in Canada. The new study was led by paleontologist Scott Persons from the University of Alberta.

Scotty’s skeleton was discovered near Eastend, Saskatchewan in 1991, but work to remove it from the ground didn’t fully start until 1994. It took paleontologists nearly a decade to excavate the fossil because it was encased in compact, cement-like sandstone. The extra effort to excavate the bones, plus the sheer size of the specimen, resulted in further delays. That said, the paleontologists were able to recover around 65 percent of the T. rex specimen, which terrorized Cretaceous Canada some 66 million years ago.

Early attempts to characterize the skeleton between 2008 and 2014 were marred by inaccuracies owing to the fact that the fossil hadn’t been fully prepared for analysis. Consequently, and as Persons pointed out in the new study, Scotty “has never been formally described and its skeletal proportions scientifically quantified.” The new study is now the first to offer detailed and accurate measurements of the skeleton, including a comparative analysis with other known T. rex fossils.

-snip-

 

jhlc9biveexsiv9m0ftr.jpg
Read more: https://gizmodo.com/...ally-1833547406


"What is freedom of expression? Without the freedom to offend, it ceases to exist." - Salman Rushdie

 

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#26
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First-confirmed occurrence of a lambeosaurine dinosaur found on Alaska's North Slope

by Heritage Daily 29, 2019

DINO11-1024x683.jpg




Paleontologists have discovered the first-confirmed occurrence of a lambeosaurine (crested ‘duck-billed’ dinosaur) from the Arctic – part of the skull of a lambeosaurine dinosaur from the Liscomb Bonebed (71-68 Ma) found on Alaska’s North Slope.
The bonebed was previously known to be rich in hadrosaurine hadrosaurids (non-crested ‘duck-billed’ dinosaurs).

The discovery proves for the first time that lambeosaurines inhabited the Arctic during the Late Cretaceous. In addition, the numeric abundance of hadrosaurine fossils compared to the lambeosaurine fossils in the marine-influenced environment of the Liscomb Bonebed suggests the possibility that hadrosaurines and lambeosaurines had different habitat preferences.

The paleontologists’ findings were published today in Scientific Reports, an open-access, multi-disciplinary journal from Nature Research dedicated to constructive, inclusive and rigorous peer review. The paper – entitled “The first definite lambeosaurine bone from the Liscomb Bonebed of the Upper Cretaceous Prince Creek Formation, Alaska, United States” – is co-authored by Yoshitsugu Kobayashi, Ph.D., and Ryuji Takasaki, of Hokkaido University, in cooperation with Anthony R. Fiorillo, Ph.D., of the Perot Museum of Nature and Science. Other authors are Ronald Tykoski, Ph.D. of the Perot Museum and Paul McCarthy, Ph.D., of the University of Alaska.

 


More:
https://www.heritage...th-slope/122938

"What is freedom of expression? Without the freedom to offend, it ceases to exist." - Salman Rushdie

 

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#27
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New species of mastodon discovered in California

by Bob Yirka, Science X Network, Phys.org

A team of researchers affiliated with several institutions in the U.S. has discovered a new species of mastodon. In their paper uploaded to the peer-reviewed journal PeerJ, the group describes discovering the new species and why it has only just been found.

 

Mastodon were large animals that resembled modern elephants. They existed during parts of the Miocene and Pleistocene epochs, and were related to mammoths. They have been extinct for approximately 3000 years. Scientists have known of their existence for approximately 200 years—and they have been studied extensively, which makes the discovery of a new species very much a surprise.

 

https://phys.org/new...california.html


"What is freedom of expression? Without the freedom to offend, it ceases to exist." - Salman Rushdie

 

“He who dares not offend cannot be honest,” — Thomas Paine


#28
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Ancient, four-legged whale with otter-like features found along the coast of Peru

by Cell Press
 

Cetaceans, the group including whales and dolphins, originated in south Asia more than 50 million years ago from a small, four-legged, hoofed ancestor. Now, researchers reporting the discovery of an ancient four-legged whale—found in 42.6-million-year-old marine sediments along the coast of Peru—have new insight into whales' evolution and their dispersal to other parts of the world. The findings are reported in the journal Current Biology on April 4.

 

The presence of small hooves at the tip of the whale's fingers and toes and its hip and limbs morphology all suggest that this whale could walk on land, according to the researchers. On the other hand, they say, anatomical features of the tail and feet, including long, likely webbed appendages, similar to an otter, indicate that it was a good swimmer too.

 

https://phys.org/new...e-features.html



#29
Sciencerocks

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Perfectly preserved dinosaur skin found in Korea

by University of Colorado Denver

Paleontologists are used to finding dinosaur bones and tracks. But remnants of soft tissue, like muscles or skin, are rare and often not well preserved. A very small percentage of tracks – much less than 1% – show skin traces.

 

Kyung-Soo Kim, Ph.D., of Chinju National University of Education recently found a set of very small tracks with perfect skin traces near Jinju City, Korea. CU Denver Professor Emeritus of Geology Martin Lockley, Ph.D., – with Kim, Jong Deock Lim of Korea and Lida Xing of Beijing – wrote a paper about the skin traces for the journal Scientific Reports. They described the skin as "exquisitely preserved."

 

https://phys.org/new...skin-korea.html


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#30
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No image? Lame


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#31
Sciencerocks

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No image? Lame

 

 

Why won't you get off your lazy ass and open the fucking link?

 

Attack me and I'll attack you.


"What is freedom of expression? Without the freedom to offend, it ceases to exist." - Salman Rushdie

 

“He who dares not offend cannot be honest,” — Thomas Paine


#32
Sciencerocks

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Perfectly preserved dinosaur skin found in Korea

by University of Colorado Denver

perfectlypre.jpg

Paleontologists are used to finding dinosaur bones and tracks. But remnants of soft tissue, like muscles or skin, are rare and often not well preserved. A very small percentage of tracks – much less than 1% – show skin traces.

 

Kyung-Soo Kim, Ph.D., of Chinju National University of Education recently found a set of very small tracks with perfect skin traces near Jinju City, Korea. CU Denver Professor Emeritus of Geology Martin Lockley, Ph.D., – with Kim, Jong Deock Lim of Korea and Lida Xing of Beijing – wrote a paper about the skin traces for the journal Scientific Reports. They described the skin as "exquisitely preserved."

 


"What is freedom of expression? Without the freedom to offend, it ceases to exist." - Salman Rushdie

 

“He who dares not offend cannot be honest,” — Thomas Paine


#33
Yuli Ban

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No image? Lame

 

 

Why won't you get off your lazy ass and open the fucking link?

 

Attack me and I'll attack you.

There's no image of the purported dinosaur skin in the article.


And remember my friend, future events such as these will affect you in the future.





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