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Why did dinosaurs die?
What caused dinosaur extinction?
Did dinosaurs die 66 million years ago?
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Jun 22, 2024 · Reptiles increased in diversity and number, and the first dinosaurs appeared, heralding the great radiation that would characterize this group during the Jurassic and Cretaceous periods. Finally, the end of the Triassic saw the appearance of the first mammals —tiny, fur-bearing, shrewlike animals derived from reptiles.
- Alan Logan
1 day ago · Dinosaurs, as the largest vertebrates, were the first affected by environmental changes, and their diversity declined. At the same time, particulate materials from volcanism cooled and dried areas of the globe.
Jun 20, 2024 · Life on Earth was flourishing 250 million years ago. Dinosaurs had yet to evolve. Instead, giant amphibians and sail-backed reptiles called therapsids thrived. But within a blink of geologic time, in a span of about 60,000 years, scientists estimate 95 percent of all living things went extinct.
Jun 21, 2024 · The fossil, which dates back about 237 million years, predates the rise of the dinosaurs, reinforces the wide geographical distribution of crocodile-like reptiles called pseudosuchians, and represents an evolutionary link to the modern crocodile. The new species has been named Parvosuchus aurelioi.
4 days ago · Proposed causes for the extinction of dinosaurs have included everything from disease, heat waves, cold spells, faunal changes, and an asteroid collision during the K–T boundary.
4 days ago · The extermination of the dinosaurs has been a puzzle to paleontologists, geologists, and biologists for two centuries. Proposed causes include disease, heat waves and resulting sterility, freezing cold spells, the rise of egg-eating mammals, and X-rays from a nearby exploding supernova.
1 day ago · In 2013, scientists described the world’s oldest known grape seed fossils, which had been found in India and were around 66 million years old. Their age lined up with the mass extinction event ...
