Dinosaurs were already in decline when asteroid hit 66 million years ago, study claims

The dinosaurs did NOT go out with a bang! Ancient creatures were already in decline when the asteroid hit 66 million years ago, and went extinct ‘with a groan’, says study.

  • Scientists studied more than 1,000 dinosaur eggs and shells from China
  • The 1,000 samples represented only three species of dinosaurs.
  • This suggests that dinosaur diversity was already declining before the asteroid impact.

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They are often depicted coming out with a ‘bang’ after a huge asteroid hit Earth 66 million years ago.

But a new study suggests that the dinosaurs got away with more than a ‘whimper’.

Researchers from the Chinese Academy of Sciences studied more than 1,000 fossilized dinosaur eggs and eggshells and say the animals were already in decline when the asteroid hit, possibly as a result of climate change.

“Our results support a long-term decline in global dinosaur biodiversity before 66 million years ago, which likely set the stage for the late Cretaceous non-avian dinosaur mass extinction,” the team wrote in their study, published today. in PNAS.

They are often depicted coming out with a 'bang' after a huge asteroid hit Earth 66 million years ago.  But a new study suggests the dinosaurs left more with a 'whimper' than a bang.

They are often depicted coming out with a ‘bang’ after a huge asteroid hit Earth 66 million years ago. But a new study suggests the dinosaurs left more with a ‘whimper’ than a bang.

Researchers from the Chinese Academy of Sciences studied more than 1,000 fossilized dinosaur eggs and eggshells, and say the animals were already in decline when the asteroid hit.

Researchers from the Chinese Academy of Sciences studied more than 1,000 fossilized dinosaur eggs and eggshells, and say the animals were already in decline when the asteroid hit.

Researchers from the Chinese Academy of Sciences studied more than 1,000 fossilized dinosaur eggs and eggshells, and say the animals were already in decline when the asteroid hit.

Dinosaurs ruled and dominated the Earth until about 66 million years ago.

A six-mile-wide asteroid called Chicxulub has slammed into what is now Mexico, triggering a mass extinction that wiped out more than 75 percent of Earth’s species.

While previous studies have shown that a wide range of dinosaurs were on Earth just before the asteroid hit, until now it was unclear whether they were in their prime or already in decline.

Most of the data on the last days of the dinosaurs comes from North America, but for this study, the researchers turned to records from China.

The team studied more than 1,000 fossilized dinosaur eggs and eggshells from the Shanyang Basin in central China.  These fossils come from rock sequences, which the researchers were able to age using computer models.

The team studied more than 1,000 fossilized dinosaur eggs and eggshells from the Shanyang Basin in central China.  These fossils come from rock sequences, which the researchers were able to age using computer models.

The team studied more than 1,000 fossilized dinosaur eggs and eggshells from the Shanyang Basin in central China. These fossils come from rock sequences, which the researchers were able to age using computer models.

Their findings indicate that there was a decline in dinosaur diversity over the two-million-year period, with the 1,000 egg fossils belonging to just three species: Macroolithus yaotunensis, Elongatoolithus elongatus, and Stromatoolithus pinglingensis.

Their findings indicate that there was a decline in dinosaur diversity over the two-million-year period, with the 1,000 egg fossils belonging to just three species: Macroolithus yaotunensis, Elongatoolithus elongatus, and Stromatoolithus pinglingensis.

Their findings indicate that there was a decline in dinosaur diversity over the two-million-year period, with the 1,000 egg fossils belonging to just three species: Macroolithus yaotunensis, Elongatoolithus elongatus, and Stromatoolithus pinglingensis.

The team studied more than 1,000 fossilized dinosaur eggs and eggshells from the Shanyang Basin in central China.

These fossils came from rock sequences, which the researchers were able to age using computer models.

This allowed them to create a timeline of almost two million years to the end of the Cretaceous, the period just before the extinction, which could then be compared with data from around the world.

Their findings indicate that there was a decline in dinosaur diversity over the two-million-year period, with the 1,000 egg fossils belonging to just three species: Macroolithus yaotunensis, Elongatoolithus elongatus, and Stromatoolithus pinglingensis.

While the reason for this decline that led to the asteroid remains unclear, researchers have several theories.

While the reason for this decline that led to the asteroid remains unclear, researchers have several theories.

While the reason for this decline that led to the asteroid remains unclear, researchers have several theories.

The team studied more than 1,000 fossilized dinosaur eggs and eggshells from the Shanyang Basin in central China.

The team studied more than 1,000 fossilized dinosaur eggs and eggshells from the Shanyang Basin in central China.

The team studied more than 1,000 fossilized dinosaur eggs and eggshells from the Shanyang Basin in central China.

A few other dinosaur bones have been found in the region, showing that the tyrannosaurus and sauropod also lived in the area between 66.4 and 68.2 million years ago.

“The small number of dinosaurs in the Shanyang Basin and central China is far from the world represented in Jurassic Park,” the team said in a statement.

While the reason for this decline leading up to the asteroid remains unclear, researchers have several theories.

This long-term worldwide decline in dinosaur diversity through the end of the Cretaceous Period and sustained low numbers of dinosaur lineages over the last few million years may have been the result of known global climate fluctuations and massive volcanic eruptions, that is, from the Deccan traps. in India’, they suggest.

“These factors may have led to instability throughout the ecosystem, making non-bird dinosaurs vulnerable to mass extinction coinciding with the asteroid impact.”

HOW THE DINOSAURS GOT EXTINCT AROUND 66 MILLION YEARS AGO

Dinosaurs ruled and dominated the Earth some 66 million years ago, before they suddenly went extinct.

The Cretaceous-Tertiary extinction event is the name given to this mass extinction.

For many years it was believed that climate change was destroying the food chain of the huge reptiles.

In the 1980s, paleontologists discovered a layer of iridium.

This is an element that is rare on Earth but is found in large quantities in space.

When this was dated, it coincided precisely with the time when dinosaurs disappeared from the fossil record.

A decade later, scientists discovered the massive Chicxulub crater at the tip of Mexico’s Yucatán Peninsula, dating from the period in question.

The scientific consensus now says that these two factors are related and that they were both probably caused by a huge asteroid crashing into Earth.

With the projected impact size and speed, the collision would have caused a huge shock wave and likely triggered seismic activity.

The radioactive fallout would have created plumes of ash that probably covered the entire planet and made it impossible for the dinosaurs to survive.

Other species of animals and plants had a shorter time span between generations, which allowed them to survive.

There are several other theories as to what caused the famous animals to disappear.

One early theory was that the small mammals ate dinosaur eggs and another proposes that toxic angiosperms (flowering plants) killed them.

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