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Scientists have discovered 125 million years old dinosaur cells, including the remains of organic molecules

Scientist from China They say they have isolated 125 million-year-old “finely preserved” chondrocytes of dinosaurs containing organic molecules, which may suggest that dinosaur DNA may one day be found. I have.

Researchers at the Institute of Vertebrate Paleontology (IVPP) and the Shandong Pingyi Nature Museum of the Chinese Academy of Sciences have discovered nuclei containing organic components and “fossilized threads of chromatin” in the cartilage of the dinosaur Caudipteryx. Peacock size.

Chinese scientists have isolated 125 million-year-old dinosaur “finely preserved” chondrocytes containing organic molecules

They found a nucleus in the cartilage of Caudipteryx containing organic and fossilized chromatin. Cartilage from the right femur of a dinosaur (close-up of b)

They found a nucleus in the cartilage of Caudipteryx containing organic and fossilized chromatin. Cartilage from the right femur of a dinosaur (close-up of b)

Researchers took cells from cartilage and stained them with a purple chemical known as hematoxylin.

Researchers took cells from cartilage and stained them with a purple chemical known as hematoxylin.

In addition to chromatin, researchers have discovered that there are two types of cells in cartilage. Healthy cells and cells that are in the process of dying when the animal itself dies.

The authors state that the conserved cell nuclei of extinct organisms such as dinosaurs are “currently considered rare and exceptional,” but there are examples previously discovered.

These include certain mammals, Mesozoic dinosaurs, and plants over 600 million years old.

“Recent taphonomy experiments on plants and algae have shown that the nuclei are surprisingly stable and that nuclear decay is much slower than initially thought under some conditions,” they wrote in the study. rice field.

After the animal died, the cells were mineralized by silicification from volcanic ash and could be preserved in such an incredible state.

After the animal died, the cells were mineralized by silicification from volcanic ash and could be preserved in such an incredible state.

Silicon dioxide from the volcanic ash that covered the corpse may have “exquisitely preserved” the cells.

“These cells may have already died even before the animal died,” said Alida Bailleul, an IVPP associate professor and co-author of the study. statement..

In the early Cretaceous, peacock-sized Caudipteryx lived on the shores of the Jehol Biota in Liaoning Province.

In the early Cretaceous, peacock-sized Caudipteryx lived on the shores of the Jehol Biota in Liaoning Province.

In the early Cretaceous, peacock-sized Caudipteryx lived on the shores of the Jehol Biota in Liaoning Province.

It was able to reach a speed of 17mph 2019 study And I learned to fly by chance. The first specimen was discovered in China in 1997.

Researchers took cells from the cartilage and stained them with a purple chemical known as hematoxylin.

Then they saw a nucleus with a dark purple thread. This indicates that it retains some of the original organic molecules and chromatin.

The cartilage from the right femur of the dinosaur was analyzed by several different chemical methods, along with chicken cartilage for comparison.

The cartilage from the right femur of the dinosaur was analyzed by several different chemical methods, along with chicken cartilage for comparison.

The cartilage from the right femur of the dinosaur was analyzed by several different chemical methods, along with chicken cartilage for comparison.

“Two specimens reacted in the same way, and one dinosaur chondrocyte revealed a nucleus with a fossilized thread of chromatin,” the researchers write.

‘This is the second example of fossilized chromatin threads found in vertebrate materials.

“These data show that some of the original nuclear biochemistry is conserved in this dinosaur cartilage material, further supporting the hypothesis that cartilage is prone to nuclear fossils, and deep DNA conservation. Is a great candidate for a better understanding of. “

After the animal died, the cells were mineralized by silicification from volcanic ash and could be preserved in such an incredible state.

“Geological data have been accumulated over the years, indicating that fossil conservation in the Jehol Biota was exceptional due to the fine volcanic ash that embedded the carcasses and preserved to the cellular level. “, Says LIZhiheng, one of the co-authors of the study. In the statement, Associate Professor of IVPP.

According to Bayur, more work needs to be done to see if the dinosaur’s original DNA is preserved, but that’s not entirely out of the question.

“To be honest, we’re obviously interested in fossilized nuclei, because if DNA was preserved, most of it would be there,” Bayur explained.

“So we have good preliminary data, very exciting data, but we are just beginning to understand the cell biochemistry of very old fossils. At this point, we need to work more. “

The study is published at Communication biology..

How dinosaurs went extinct 66 million years ago

Dinosaurs ruled and ruled the Earth about 66 million years ago, before they suddenly became extinct.

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

It has long been believed that climate change has disrupted the food chain of giant reptiles.

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

This is a rare element on Earth, but it is abundant in space.

When this was dated, it exactly matched when the dinosaur disappeared from the fossil record.

Ten years later, scientists discovered a giant Chicxulub crater at the tip of the Yucatan Peninsula in Mexico, dating back to the period in question.

Scientific consensus now states that these two factors are related, probably both due to the impact of a giant asteroid on Earth.

At the predicted size and impact velocity, the collision caused a huge shock wave, probably seismic activity.

The fallout probably covered the entire globe and created an ash eruption that made it impossible for dinosaurs to survive.

Other animal and plant species have a short intergenerational period and have survived.

There are several other theories as to what caused the death of the famous animal.

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

Scientists have discovered 125 million years old dinosaur cells, including the remains of organic molecules

Source link Scientists have discovered 125 million years old dinosaur cells, including the remains of organic molecules

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