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Scientists recover proteins from a 24 million-year-old rhino fossil

Scientists recover proteins from a 24 million-year-old rhino fossil

Saudi Gazette7 days ago
LONDON — Scientists have recovered ancient proteins from a fossilized rhinoceros tooth, breaking new ground in the study of ancient life on Earth.
The 24-million-year-old tooth, which was unearthed in the Canadian Arctic, contains proteins that are 10 times older than the most ancient known DNA. Using the sample, scientists have now analyzed the oldest detailed protein sequence on record.
'Enamel is so hard it protects these proteins over deep time (long time scales),' said Ryan Sinclair Paterson, a postdoctoral researcher at the Globe Institute at the University of Copenhagen in Denmark who led the Canadian research. 'It's essentially like a vault. What we did was unlock this vault, at least for this specific fossil.'
The study of ancient DNA preserved in bones, fossils and dirt has revolutionized archaeological science, pulling back the curtain on lost empires, mysterious clans, ice age creatures and previously unknown human species. Ancient proteins promise a similar revolution for fossils that are many millions of years old and currently beyond the chronological reach of ancient DNA.
The study, which published July 9 in the scientific journal Nature, showcases the enormous potential of the field, known as paleoproteomics.
Proteins, which are made up of sequences of amino acids, are more robust than DNA, a fragile molecule that degrades relatively easily. Although proteins contain less detailed information, they can help to elucidate a specimen's evolutionary history, diet, even in some cases the sex of a fossil.
'The next step is to demonstrate that it's not just one sample, one lucky strike,' said coauthor Enrico Cappellini, a professor at the University of Copenhagen's Globe Institute who has pioneered methods to extricate proteins from fossils and was involved in the Canadian research.
'But potentially there's a huge area of research that could be further clarified and then, if we really push it farther ... we could even start to investigate dinosaurs,' he added.
Cappellini and Paterson, along with colleagues at the University of York and the Canadian Museum of Nature, recovered sequences from seven proteins preserved inside the fossilized rhino tooth.
Sequencing ancient proteins involves determining the order of amino acids in a sample. By comparing the sequences with those of living and extinct relatives, the scientists were able to glean information about the evolution of the rhino. The analysis revealed that it diverged from the same family as living rhinos about 41 million to 25 million years ago.
'In the fossil record, there were some crazy forms (of rhinoceros species). There's the woolly rhinoceros, and maybe you've heard of the Siberian unicorn with the gigantic horn,' Paterson said. 'What we were able to do is compare our mystery rhino with other forms and find out where it falls in the family tree.'
Separate research, also published July 9 in the journal Nature, which sampled fossils from Kenya's Turkana Basin, suggests that biomolecules can survive for millions of years, even in searing, tropical environments.
The study, which analyzed 10 mammal fossils, including the relatives of today's elephants, hippos and rhinos, was published by researchers at the Smithsonian Institution's Museum Conservation Institute and Harvard University.
They recovered proteins from five of the fossils dated 1.5 million to 18 million years ago, and found that even in tropical regions with high temperatures scientists can extract prehistoric proteins, which can reveal links between ancient elephants and rhinos and their modern-day relatives.
While the information contained in the Kenyan proteins wasn't as detailed as that found in the Canadian fossil, the authors said that their presence within enamel tissues in one of the world's warmest regions holds promise that proteins in much older fossils could be discovered.
'We were excitingly successful. We went back to about 18 million years. I think going back in time should be possible,' said study author Timothy Cleland, a physical scientist at the Museum Conservation Institute.
The research on the Canadian fossil was 'sound and super interesting,' said Maarten Dhaenens, a researcher at the University of Ghent in Belgium who specializes in proteomics. However, Dhaenens, who wasn't involved in either study, said the methodology used on the Kenyan fossils was complex and less tested. The researchers' findings, he argued, are harder to interpret and warranted a more thorough assessment.
'The data is publicly available, so we should be able to verify their claims through manual validation, but this takes time,' he said via email.
Evan Saitta, paleontologist and research associate at Chicago's Field Museum of Natural History, said it was 'shocking' to find proteins preserved within fossils at tropical latitudes and added that the findings needed replication. It had been previously assumed that cold temperatures were necessary to slow down the breakdown of proteins.
'If that is a true result ... it should be very easy to replicate,' he noted. 'We should be able to go around all different fossil sites all over the world and find enamel peptides (proteins).'
Getting proteins from fossils this old would be a palaeontologist's dream come true, said Matthew Collins, the McDonald Professor in Palaeoproteomics at the UK's University of Cambridge, who agreed that the research on the Canadian fossil was more convincing. Collins, like Saitta, was not involved in the new research.
'This is amazing. It's really exciting, but at the same time I've been disappointed so much in my career by thinking that we had very old proteins and we didn't,' added Collins, who has tried to recover proteins from dinosaur fossils.
Collins and Saitta were part of a team that detected amino acids in a titanosaur eggshell fragment, according to research published in 2024. The egg was laid by a plant-eating sauropod, a huge, long-necked dinosaur that lived in the Late Cretaceous, shortly before dinosaurs went extinct 66 million years ago.
However, the dinosaur eggshell lacked any identifiable protein sequences. Their results were akin to identifying five letters in a novel, revealing only a pattern of decay that showed there were once proteins in the eggshell, said Saitta.
'There's no sequence left, no information, just the little individual Lego building blocks of (amino acids),' Collins said.
Getting protein information from a dinosaur tooth is a long shot, and Saitta noted that he had given up looking for proteins in dinosaur fossils in favor of exploring more interesting research questions.
Not only are dinosaur fossils far older than the fossils in the two studies, he noted, but they mostly date back to a hothouse period in the global climate when there were no ice caps. What's more, on average, dinosaur fossils are buried far deeper and thus have experienced far greater geothermal heat. It's also not clear whether dinosaur teeth had thick enough enamel to preserve proteins, he added.
Cappellini and Paterson said it might be possible to retrieve useful protein information from dinosaur fossils within 10 years, although there were other interesting questions to investigate first, such as how mammals came to dominate the planet after the dinosaurs' demise.
'I really think some sites might preserve dinosaur proteins in deep time. Maybe we can give those a shot,' Paterson said. — CNN
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Scientists recover proteins from a 24 million-year-old rhino fossil
Scientists recover proteins from a 24 million-year-old rhino fossil

Saudi Gazette

time7 days ago

  • Saudi Gazette

Scientists recover proteins from a 24 million-year-old rhino fossil

LONDON — Scientists have recovered ancient proteins from a fossilized rhinoceros tooth, breaking new ground in the study of ancient life on Earth. The 24-million-year-old tooth, which was unearthed in the Canadian Arctic, contains proteins that are 10 times older than the most ancient known DNA. Using the sample, scientists have now analyzed the oldest detailed protein sequence on record. 'Enamel is so hard it protects these proteins over deep time (long time scales),' said Ryan Sinclair Paterson, a postdoctoral researcher at the Globe Institute at the University of Copenhagen in Denmark who led the Canadian research. 'It's essentially like a vault. What we did was unlock this vault, at least for this specific fossil.' The study of ancient DNA preserved in bones, fossils and dirt has revolutionized archaeological science, pulling back the curtain on lost empires, mysterious clans, ice age creatures and previously unknown human species. Ancient proteins promise a similar revolution for fossils that are many millions of years old and currently beyond the chronological reach of ancient DNA. The study, which published July 9 in the scientific journal Nature, showcases the enormous potential of the field, known as paleoproteomics. Proteins, which are made up of sequences of amino acids, are more robust than DNA, a fragile molecule that degrades relatively easily. Although proteins contain less detailed information, they can help to elucidate a specimen's evolutionary history, diet, even in some cases the sex of a fossil. 'The next step is to demonstrate that it's not just one sample, one lucky strike,' said coauthor Enrico Cappellini, a professor at the University of Copenhagen's Globe Institute who has pioneered methods to extricate proteins from fossils and was involved in the Canadian research. 'But potentially there's a huge area of research that could be further clarified and then, if we really push it farther ... we could even start to investigate dinosaurs,' he added. Cappellini and Paterson, along with colleagues at the University of York and the Canadian Museum of Nature, recovered sequences from seven proteins preserved inside the fossilized rhino tooth. Sequencing ancient proteins involves determining the order of amino acids in a sample. By comparing the sequences with those of living and extinct relatives, the scientists were able to glean information about the evolution of the rhino. The analysis revealed that it diverged from the same family as living rhinos about 41 million to 25 million years ago. 'In the fossil record, there were some crazy forms (of rhinoceros species). There's the woolly rhinoceros, and maybe you've heard of the Siberian unicorn with the gigantic horn,' Paterson said. 'What we were able to do is compare our mystery rhino with other forms and find out where it falls in the family tree.' Separate research, also published July 9 in the journal Nature, which sampled fossils from Kenya's Turkana Basin, suggests that biomolecules can survive for millions of years, even in searing, tropical environments. The study, which analyzed 10 mammal fossils, including the relatives of today's elephants, hippos and rhinos, was published by researchers at the Smithsonian Institution's Museum Conservation Institute and Harvard University. They recovered proteins from five of the fossils dated 1.5 million to 18 million years ago, and found that even in tropical regions with high temperatures scientists can extract prehistoric proteins, which can reveal links between ancient elephants and rhinos and their modern-day relatives. While the information contained in the Kenyan proteins wasn't as detailed as that found in the Canadian fossil, the authors said that their presence within enamel tissues in one of the world's warmest regions holds promise that proteins in much older fossils could be discovered. 'We were excitingly successful. We went back to about 18 million years. I think going back in time should be possible,' said study author Timothy Cleland, a physical scientist at the Museum Conservation Institute. The research on the Canadian fossil was 'sound and super interesting,' said Maarten Dhaenens, a researcher at the University of Ghent in Belgium who specializes in proteomics. However, Dhaenens, who wasn't involved in either study, said the methodology used on the Kenyan fossils was complex and less tested. The researchers' findings, he argued, are harder to interpret and warranted a more thorough assessment. 'The data is publicly available, so we should be able to verify their claims through manual validation, but this takes time,' he said via email. Evan Saitta, paleontologist and research associate at Chicago's Field Museum of Natural History, said it was 'shocking' to find proteins preserved within fossils at tropical latitudes and added that the findings needed replication. It had been previously assumed that cold temperatures were necessary to slow down the breakdown of proteins. 'If that is a true result ... it should be very easy to replicate,' he noted. 'We should be able to go around all different fossil sites all over the world and find enamel peptides (proteins).' Getting proteins from fossils this old would be a palaeontologist's dream come true, said Matthew Collins, the McDonald Professor in Palaeoproteomics at the UK's University of Cambridge, who agreed that the research on the Canadian fossil was more convincing. Collins, like Saitta, was not involved in the new research. 'This is amazing. It's really exciting, but at the same time I've been disappointed so much in my career by thinking that we had very old proteins and we didn't,' added Collins, who has tried to recover proteins from dinosaur fossils. Collins and Saitta were part of a team that detected amino acids in a titanosaur eggshell fragment, according to research published in 2024. The egg was laid by a plant-eating sauropod, a huge, long-necked dinosaur that lived in the Late Cretaceous, shortly before dinosaurs went extinct 66 million years ago. However, the dinosaur eggshell lacked any identifiable protein sequences. Their results were akin to identifying five letters in a novel, revealing only a pattern of decay that showed there were once proteins in the eggshell, said Saitta. 'There's no sequence left, no information, just the little individual Lego building blocks of (amino acids),' Collins said. Getting protein information from a dinosaur tooth is a long shot, and Saitta noted that he had given up looking for proteins in dinosaur fossils in favor of exploring more interesting research questions. Not only are dinosaur fossils far older than the fossils in the two studies, he noted, but they mostly date back to a hothouse period in the global climate when there were no ice caps. What's more, on average, dinosaur fossils are buried far deeper and thus have experienced far greater geothermal heat. It's also not clear whether dinosaur teeth had thick enough enamel to preserve proteins, he added. Cappellini and Paterson said it might be possible to retrieve useful protein information from dinosaur fossils within 10 years, although there were other interesting questions to investigate first, such as how mammals came to dominate the planet after the dinosaurs' demise. 'I really think some sites might preserve dinosaur proteins in deep time. Maybe we can give those a shot,' Paterson said. — CNN

Alien Planet Lashed by Huge Flares from its 'Angry Beast' Star
Alien Planet Lashed by Huge Flares from its 'Angry Beast' Star

Asharq Al-Awsat

time08-07-2025

  • Asharq Al-Awsat

Alien Planet Lashed by Huge Flares from its 'Angry Beast' Star

Scientists are tracking a large gas planet experiencing quite a quandary as it orbits extremely close to a young star - a predicament never previously observed. This exoplanet, as planets beyond our solar system are called, orbits its star so tightly that it appears to trigger flares from the stellar surface - larger than any observed from the sun - reaching several million miles (km) into space that over time may strip much of this unlucky world's atmosphere, Reuters reported. The phenomenon appears to be caused by the planet's interaction with the star's magnetic field, according to the researchers. And this star is a kind known to flare, especially when young. "A young star of this type is an angry beast, especially if you're sitting as close up as this planet does," said Netherlands Institute for Radio Astronomy astrophysicist Ekaterina Ilin, lead author of the study published in the journal Nature. The star, called HIP 67522, is slightly more massive than the sun and is located about 407 light-years from Earth in the constellation Centaurus. A light-year is the distance light travels in a year, 5.9 trillion miles (9.5 trillion km). This star and planet, as well as a second smaller gas planet also detected in this planetary system, are practically newborns. Whereas the sun and our solar system's planets are roughly 4.5 billion years old, this star is about 17 million years old, with its planets slightly younger. The planet, named HIP 67522 b, has a diameter almost the size of Jupiter, our solar system's largest planet, but with only 5% of Jupiter's mass. That makes it one of the puffiest exoplanets known, with a consistency reminiscent of cotton candy (candy floss). It orbits five times closer to its star than our solar system's innermost planet Mercury orbits the sun, needing only seven days to complete an orbit. A flare is an intense eruption of electromagnetic radiation emanating from the outermost part of a star's atmosphere, called the corona. So how does HIP 67522 b elicit huge flares from the star? As it orbits, it apparently interacts with the star's magnetic field - either through its own magnetic field or perhaps through the presence of conducting material such as iron in the planet's composition. "We don't know for sure what the mechanism is. We think it is plausible that the planet moves within the star's magnetic field and whips up a wave that travels along magnetic field lines to the star. When the wave reaches the stellar corona, it triggers flares in large magnetic field loops that store energy, which is released by the wave," Ilin said. "As it moves through the field like a boat on a lake, it creates waves in its wake," Ilin added. "The flares these waves trigger when they crash into the star are a new phenomenon. This is important because it had never been observed before, especially at the intensity detected." The researchers believe it is a specific type of wave called an Alfvén wave, named for 20th century Swedish physicist and Nobel Prize laureate Hannes Alfvén, that propagates due to the interaction of magnetic fields. The flares may heat up and inflate the planet's atmosphere, which is dominated by hydrogen and helium. Being lashed by these flares could blast away lighter elements from the atmosphere and reduce the planet's mass over perhaps hundreds of millions of years. "At that time, it will have lost most if not all the light elements, and become what's called a sub-Neptune - a gas planet smaller than Neptune," Ilin said, referring to the smallest of our solar system's gas planets. The researchers used observations by two space telescopes: NASA's TESS, short for Transiting Exoplanet Survey Satellite, and the European Space Agency's CHEOPS, short for CHaracterising ExOPlanet Satellite. The plight of HIP 67522 b illustrates the many circumstances under which exoplanets exist. "It is certainly no sheltered youth for this planet. But I am not sad about it. I enjoy diversity in all things nature, and what this planet will eventually become - perhaps a sub-Neptune rich in heavy elements that did not evaporate - is no less fascinating than what we observe today."

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