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Dinosaur DNA discovered, scientists claim

Posted on Tuesday, 3 March, 2020 | Comment icon 8 comments

Perhaps John Hammond was right all along... Image Credit: CC BY 2.0 HarshLight
Palaeontologists report that they have retrieved DNA from dinosaur fossils dating back to the Cretaceous.
Various news outlets this week have reported that scientists led by Alida Bailleul from the Chinese Academy of Science in Beijing have discovered cartilage cells, chromosomes and DNA in the skull fragments of baby duck-billed dinosaurs.

Dating back 75 million years, these juvenile reptiles were unearthed at the Two Medicine Formation in Montana which has long proven a popular site among fossil hunters.

"These new exciting results add to growing evidence that cells and some of their biomolecules can persist in deep-time," said Bailleul.

"They suggest DNA can preserve for tens of millions of years. We hope that this study will encourage scientists working on ancient DNA to push current limits and to use new methodology in order to reveal all the unknown molecular secrets that ancient tissues have."
But is it really possible that such an ancient fossil could have yielded DNA ?

Several experts have expressed skepticism about the findings, especially given that neither protein nor DNA are known to preserve for very long periods of time.

The oldest known full genome was recovered from a 700,000-year-old horse preserved in permafrost while the oldest known proteins were found in ostrich egg shells dating back 3.8 million years.

To accept that both protein and DNA have been recovered from dinosaur remains dating back tens of million of years therefore is somewhat difficult.

A lot more research will clearly be needed to fully corroborate the findings.

Source: Gizmodo | Comments (8)

Tags: Dinosaur, DNA

Recent comments on this story
Comment icon #1 Posted by RoofGardener on 3 March, 2020, 13:19
Apparently the DNA came from a Brontosaurus known as Dumbledorus Awesomaticus ?  Rumours continue to circulate that this DNA was actually discovered several years ago, and that Evil Scientists had used to to create living examples of the breed ? 
Comment icon #2 Posted by Seti42 on 3 March, 2020, 17:58
'Deep-time' sounds like a prog (or dark ambient) album. Based on what little I know about DNA, I'm very skeptical of this announcement/finding...But if accurate it's really cool and hopefully will teach us a lot.
Comment icon #3 Posted by DieChecker on 3 March, 2020, 18:50
Not to be too big a stickler, but these were dinosaurs, not reptiles.
Comment icon #4 Posted by Saru on 3 March, 2020, 18:59
Dinosaurs are generally classed as reptiles.
Comment icon #5 Posted by Essan on 3 March, 2020, 19:03
I think it's now believed that many dinosaurs were warm blooded and not reptiles as we know them.   With birds being the better modern analogy, at least as far as the theropods are concerned. ie:  https://www.newscientist.com/article/2233396-75-million-year-old-eggshells-suggest-most-dinosaurs-were-warm-blooded/  
Comment icon #6 Posted by Saru on 3 March, 2020, 19:07
They are still classed as reptiles for the moment though, as far as I know. It's possible that this classification could be changed in the future.
Comment icon #7 Posted by Piney on 3 March, 2020, 23:19
Archosaurs, which includes birds. 
Comment icon #8 Posted by kapow53 on 5 March, 2020, 6:23
DNA from stone does not  seem likely.

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