Dinosaurs may have roamed the northern hemisphere millions of years earlier than previously thought
How and when did dinosaurs first emerge and spread across the planet more than 200 million years ago? That question has for decades been a source of debate among paleontologists faced with fragmented fossil records.
North America's oldest dinosaur is completely rewriting history
Researchers discovered Ahvaytum bahndooiveche fossils in Wyoming, revealing dinosaurs in Laurasia earlier than believed.
'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
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 new research.
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 years ago. The prevailing theory suggested that dinosaurs first arose in the southern part of the ancient supercontinent Pangaea,
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 ...
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 ...
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 ...
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 ...
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 ...