The study claims that the dinosaurs were already in retreat when the asteroid collided 66 million years ago

They are often depicted as making a “bang” after a massive asteroid hit Earth 66 million years ago.

But a new study suggests that dinosaurs came out with more ‘moans’.

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

In their study published in PNAS, the team wrote: “Our results support a long-term decline in global dinosaur biodiversity 66 million years ago, likely paving the way for the mass extinction of the non-Cretaceous dinosaur at the end of the Cretaceous period,” the team wrote in their study published in PNAS.

They are often depicted as making a “bang” after a massive asteroid hit Earth 66 million years ago. But a new study indicates that the dinosaurs came out with more “moaning” than loud

Researchers from the Chinese Academy of Sciences have studied more than 1,000 fossilized dinosaur eggs and eggshells, and claim that the animals were already in a state of decay when the asteroid collided.

Researchers from the Chinese Academy of Sciences have studied more than 1,000 fossilized dinosaur eggs and eggshells, and claim that the animals were already in a state of decay when the asteroid collided.

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

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

While previous studies have shown that a large group of dinosaurs were on Earth just before the asteroid hit, so far it’s not clear if they were at their most active or actually in decline.

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

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 modeling

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 modeling

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

Their findings indicate a decline in dinosaur diversity over a two-million-year period, with the 1,000 egg fossils belonging to only 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 modeling.

This allowed them to create a timeline of nearly two million years at the end of the Cretaceous period – the period immediately before the extinction – that can then be compared with data from around the world.

Their findings indicate a decline in dinosaur diversity over a two-million-year period, with the fossils of 1,000 eggs belonging to only three species – Macroolithus yaotunensis, Elongatoolithus elongatus, and Stromatoolithus pinglingensis.

While the reason for this dip that led to the asteroid is still unclear, researchers have several theories

While the reason for this dip that led to the asteroid is still 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

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

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

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

This long-term global decline in dinosaur diversity until the end of the Cretaceous period and the persistently low number of dinosaur lineages over the past few million years may have resulted from known global climatic fluctuations and massive volcanic eruptions, that is, from the Deccan Traps. In India,’ they suggest.

These factors may have led to instability at the ecosystem level, making non-avian dinosaurs vulnerable to mass extinctions in conjunction with the asteroid impact.

How did dinosaurs span about 66 million years ago

Dinosaurs ruled and dominated the Earth about 66 million years ago, before suddenly becoming extinct.

The third Cretaceous Extinction event is the name given to this mass extinction.

For many years it was believed that the changing climate destroyed the food chain of the mega reptiles.

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

This is a rare element on Earth but is found in huge quantities in space.

When this date was dated, it precisely coincided with the disappearance of the dinosaurs from the fossil record.

A decade later, scientists discovered the huge Chicxulub Crater at the tip of the Mexican Yucatan Peninsula, which dates back to the period in question.

The scientific consensus now says that these two factors are related, and both may have been caused by a massive asteroid collision with Earth.

With the expected size and speed of impact, the collision would have caused a massive shock wave and likely triggered seismic activity.

The fallout would have created plumes of ash that likely covered the entire planet and made surviving dinosaurs impossible.

Animals and other plant species had a shorter period of time between generations which allowed them to survive.

There are several other theories as to the reason for the demise of these famous animals.

One early theory was that small mammals eat dinosaur eggs and another suggests that poisonous angiosperms (flowering plants) kill them.

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