Mesozoic Era The interval of the Earth's history from about million to 65 million years ago is known as the Mesozoic Era.
Share via Email This article is over 2 years old Sauropod species such as Diplodocus were already in decline long before the asteroid strike that doomed them to extinction, a new study shows. Dinosaurs were on the up and up from the late Triassic about m years ago, with new species arising faster than others went extinct.
But the study reveals their fortunes had begun to change long before the catastrophic six-mile-wide asteroid hit what is now the Gulf of Mexico, 66m years ago.
The research, the authors believe, could resolve a longstanding controversy among palaeontologists.
The study looked at the three major groups of dinosaur: The results showed that while dinosaurs flourished from about m years ago, with species arising faster than they went extinct, about m years ago their success started to stall.
Eventually, about 90m years ago, 24m years before the asteroid hit, the dinosaurs entered a long-term decline, with species going extinct faster than new ones emerged. That, the authors reveal, could have left the dinosaurs more vulnerable to extinction when the six-mile-wide disaster struck.
But it was not all doom and gloom. While dinosaurs overall experienced a downturn, some were on the up: While the study does not reveal the reasons for their success, the authors suggest the rise of flowering plants could have helped.
Further insights were gleaned when the researchers teased apart the trends for each of the three major dinosaur groups.
Theropods, they discovered, went into decline around m years ago, with sauropods following around 6m years later. At that timethe ornisthischians — apart from the duck-billed and horn-faced dinosaurs — also experienced a downturn.
Asteroid that killed dinosaurs also intensified volcanic eruptions - study Read more The research also suggests that rising sea levels could have helped fuel the emergence of new species by fragmenting landscapes and isolating creatures. But Venditti believes a number of phenomena could have played a part in the loss of dinosaur species, from changes in global climate to mammals competing for resources and even nibbling at dinosaur eggs.
Not that everyone agrees.
Rather, he says, the fact that the duck-billed and horn-faced dinosaurs were doing well suggests that dinosaurs could have bounced back.Read about dinosaur discoveries including gigantic meat-eating dinosaurs, earliest dinosaurs and more. Dinosaur pictures and articles.
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Jul 10, · In the original Jurassic Park movie, Jeff Goldblum's character, Dr. Ian Malcolm says: What do they have in there, King Kong?, making reference to the size of the dinosaurs in the park.
- “The Antitrust Laws” Research Paper There once was a time where dinosaurs roamed the earth. Some dinosaurs were stronger than others, making them the superior creatures. The Tyrannosaurus Rex is not that different from a corporate empire; both T-Rexes and monopolies ruled the land with little to .