230 Million-Year-Old Fossil From Wyoming Challenges Dinosaur Origin Theories
A chicken-sized dino, the oldest known in North America, has thrown a wrench in the widely accepted timeline of early dinosaur history.
'North America's Oldest Dinosaur' Discovered, Challenging Dino Origin Story
But this is where Ahvaytum may rewrite the origin story because it originates from the North American landmass, which once formed part of Laurasia. At roughly 230 million years old, it is comparable to the oldest known dinosaurs from Gondwana.
Oldest North American dinosaur fossil discovered, dates back 230 million years
This small, chicken-sized dinosaur lived around 230 million years ago. Interestingly, this pushes back the timeline for dinosaur presence in the northern hemisphere by millions of
Oldest Equatorial Dinosaur In The World Discovered, Dating Back 230 Million Years
The oldest equatorial dinosaur in the world, and North America's oldest dinosaur, has been described in a new study. Dating back 230 million years, the chicken-sized dinosaur has big implications for our understanding of how dinosaurs spread across the world,
Newly discovered Dinosaur fossil challenges what we know about prehistoric life
A newly discovered dinosaur, uncovered by UW-Madison paleontologists, is reshaping the understanding of prehistoric reptiles.
North America's oldest dinosaur is completely rewriting history
Researchers discovered Ahvaytum bahndooiveche fossils in Wyoming, revealing dinosaurs in Laurasia earlier than believed.
Oldest dinosaur in America? 230-million-year-old previously unknown species upends existing knowled
For years, scientists believed that dinosaurs first emerged in Gondwana—the southern portion of the ancient supercontinent ...
Phys.org11d
New dinosaur, Archaeocursor asiaticus, hints at early Gondwana to Laurasia migration
A multi-institution investigation in China has introduced the world to Archaeocursor asiaticus, and the research suggests an earlier dispersal event of ornithischians from Gondwana to Laurasia ...
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Mysterious 193 million-year-old plant-eating dinosaur discovered in China
This newly identified dinosaur species represents the oldest and most primitive type of ornithischian dinosaur found in Asia so far.
Dinosaur history rewritten by fossil discovery of chicken-sized dinosaur, experts say
Dinosaurs inhabited the Northern Hemisphere millions of years earlier than scientists previously thought, according to the ...
Ginkgo Biloba: The 'Living Fossil', Older Than Dinosaurs That Survived Hiroshima Attack
Ginkgo Biloba&#039s lineage dates back more than 290 million years to the Permian period, even predating the era of the ...
La Brújula Verde2d
Small Chicken-Sized Dinosaurs Roamed the Northern Hemisphere Millions of Years Earlier Than Expected
For decades, paleontologists have debated how and when dinosaurs emerged and spread across the planet more than 200 million ...
National Geographic news3y
Jurassic Period
Laurasia, the northern half, broke up into North America and Eurasia. Gondwana, the southern half, began to break up by the mid-Jurassic. The eastern portion—Antarctica, Madagascar, India ...
Scientific American3mon
The Confirmation of Continental Drift
After years of debate many lines of evidence now favor the idea that the present continents were once assembled into two great land masses: Gondwanaland in the south, Laurasia in the north ...