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Scientists Estimate All-time T. Rex Population Was 2.5 Billion


Scientists Estimate All-time T. Rex Population Was 2.5 Billion
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A new study suggests that up to 2.5 billion Tyrannosaurus Rex dinosaurs lived on Earth over a period of a few million years.
However, the research shows that not many of these powerful creatures lived in the same place at the same time.
Tyrannosaurus Rex, commonly known as T. rex, existed on Earth for millions of years. Scientists involved in the study estimate about 2.5 billion of them lived over a period of 2.4 million years. The dinosaurs mostly lived in the area of the world now known as North America. ....

United States , University Of California At Berkeley , James Farlow , Charles Marshall , Sterling Nesbitt , Seth Borenstein , Bryan Lynn , Dan Friedell , Purdue University , Macalester College , Associated Press , University Of California Museum Paleontology , Tyrannosaurus Rex , Virginia Tech , Assistant Professor , Curry Rogers , California Museum , Comments Section , ஒன்றுபட்டது மாநிலங்களில் , பல்கலைக்கழகம் ஆஃப் கலிஃபோர்னியா இல் பெர்க்லி , ஜேம்ஸ் பாரிலோவ் , சார்லஸ் மார்ஷல் , ஸ்டெர்லிங் நெஸ்பிட் , பிரையன் லின் , பர்‌ட்யூ பல்கலைக்கழகம் , தொடர்புடையது ப்ரெஸ் ,

Scientists clarify origins of pterosaurs, the dinosaur era's flying reptiles


Scientists clarify origins of pterosaurs, the dinosaur era’s flying reptiles
Scientists may have solved one of paleontology’s enduring mysteries the evolutionary origins of the flying reptiles called pterosaurs that ruled the skies at the same time that dinosaurs dominated the land.
Researchers said last week a poorly understood Triassic Period reptile group called lagerpetids, known from a few partial skeletons from the United States, Argentina, Brazil and Madagascar, appears to have been the evolutionary precursor to pterosaurs.
Lagerpetids, first appearing about 237 million years ago, were generally small and may have been bipedal insect eaters. They could not fly. Pterosaurs became Earth’s first flying vertebrates, with birds and then bats appearing much later. ....

United States , Buenos Aires , Distrito Federal , Sterling Nesbitt , Martin Ezcurra , Triassic Period , Argentine Museum , Natural Sciences , ஒன்றுபட்டது மாநிலங்களில் , புஏனோஸ் ஐரிஸ் , திஸ்திரிதோ கூட்டாட்சியின் , ஸ்டெர்லிங் நெஸ்பிட் , ஆர்கெண்டைன் அருங்காட்சியகம் , இயற்கை அறிவியல் ,

"Missing Link" in Pterosaurs' Family Tree Has Been Identified


Very little was known about the evolution of pterosaurs – such as how they evolved to fly – but now researchers are saying that they have identified the “missing link” in their family tree. A small reptile called
lagerpetid may be the closest-known relative to pterosaurs found to date. There is, however, a significant difference between the two species which is that
lagerpetids didn’t fly.
Since the 1700s, many fossils belonging to pterosaurs have been unearthed – they dated back to between 220 million and 65 million years ago. Pterosaurs were archosaurs – a name that translated from the ancient Greek word meaning “ruling lizard”. Archosaurs were a group that included dinosaurs, crocodylians, and birds as well as pterosaurs. They first showed up around 250 million years ago in the late part of the Permian period. ....

United States , David Unwin , Sterling Nesbitt , University Of Leicester , Live Science , Virginia Tech , ஒன்றுபட்டது மாநிலங்களில் , டேவிட் ட்ந்‌விந் , ஸ்டெர்லிங் நெஸ்பிட் , பல்கலைக்கழகம் ஆஃப் லெய்செஸ்டர் , வாழ அறிவியல் , வர்ஜீனியா தொழில்நுட்பம் ,

Land-Dwelling Dinosaur Relatives Bridge Gap to Origin of Pterosaurs | Paleontology


Pterosaurs were highly successful reptiles that lived between 210 and 65 million years ago. They were the first vertebrates to evolve powered flight, but their origin has remained an unresolved enigma in paleontology since the 19th century. With the help of pterosaur skulls and skeletons that were unearthed in North America, Brazil, Argentina, and Madagascar in recent years, a team of paleontologists has now demonstrated that flightless dinosaur precursors called lagerpetids (family Lagerpetidae) are the sister group of pterosaurs.
Ixalerpeton, a species of lagerpetid that lived in what is now Brazil approximately 233 million years ago. Image credit: Rodolfo Nogueira.
Pterosaurs are deeply rooted in popular culture, are frequently portrayed in books and films, and include the largest flying animals ever known. Their evolutionary history spans more than 150 million years, ending at the close of the Mesozoic era. ....

United States , Ciencias Naturales , Sterling Nesbitt , Rodolfo Nogueira , Federico Agnolin , Michelle Stocker , Serjoscha Evers , Department Of Earth Sciences , University Of Oxford , Department Of Geosciences , Department Of Geosciences At Virginia Tech , University Of Birmingham , University Of Fribourg , North America , Upper Triassic , Middle Late Jurassic , Museo Argentino De Ciencias Naturales , Universidad Maim , Earth Sciences , ஒன்றுபட்டது மாநிலங்களில் , சீன்சியச் இயற்கை , ஸ்டெர்லிங் நெஸ்பிட் , ரோடால்போ நோக்‌வெயிர , மைக்கேல் ஸ்டாகர் , துறை ஆஃப் பூமி அறிவியல் , பல்கலைக்கழகம் ஆஃப் ஆக்ஸ்ஃபர்ட் ,