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Post by rockjunquie on Dec 21, 2021 15:46:43 GMT -5
It's crazy, they found a perfectly preserved egg in China! It suggests dinosaurs are even more bird like than we thought. Cool pics and video reanimation.
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Post by Son Of Beach on Dec 21, 2021 15:58:18 GMT -5
It's crazy, they found a perfectly preserved egg in China! It suggests dinosaurs are even more bird like than we thought. Cool pics and video reanimation.
Crazy that something organic can remain that intact for so long. I'm rather ignorant on most everything paleontology so this may have a simple answer. How do they know it's not some large extinct bird in the first place? If everything about the setup inside the egg looks like a bird and has avian characteristics...
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Post by rockjunquie on Dec 21, 2021 16:05:17 GMT -5
It's crazy, they found a perfectly preserved egg in China! It suggests dinosaurs are even more bird like than we thought. Cool pics and video reanimation.
Crazy that something organic can remain that intact for so long. I'm rather ignorant on most everything paleontology so this may have a simple answer. How do they know it's not some large extinct bird in the first place? If everything about the setup inside the egg looks like a bird and has avian characteristics... Well, they know what it is by other fossil evidence and know it to be a dinosaur. But, that's a really good question. I think this will have a lot of people asking along the same lines.
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Fossilman
Cave Dweller
Member since January 2009
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Post by Fossilman on Dec 25, 2021 13:02:08 GMT -5
Pretty cool....
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quartzilla
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Post by quartzilla on Dec 26, 2021 21:17:35 GMT -5
I remember reading a book written by the paleontologist who found all the duckbill nests with eggs in them. They even found one with the mother duckbill sitting on it protecting the eggs when the catastrophe happened that buried them in ash and debris that caused them to be petrified. I believe dinosaurs, at least the later ones, were way more intelligent than given credit for. I like to think this duckbill’s last thought were to protect her eggs at all costs, even in the face of annihilation.
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Post by Peruano on Dec 30, 2021 13:42:34 GMT -5
In the most simplistic explanation possible, there were two major lines of evolution in the reptile world. The early lines gave rise to turtles, crocodilians, dinosaurs and birds. Maternal behavior (guarding of nests, guarding of young, and feeding of young occurs in all of these groups (especially the latter 3). Turtles are known to protect nests but are less obvious maternal care candidates. The other evolutionary line led to tuataras, snakes and lizards. While there is some parental care in some snakes and lizards, it would appear that its a secondary innovation that popped up several times and not carried from their ancient lineage. Alligators and crocodilians guard nests, guard the young, carry them around in their mouths and on their backs and respond to distress call of the young. Sounds like the maternal care we think of in birds doesn't it. There is a lot of evidence that points to similar behaviours in dinosaurs. I should point out that the maternal care we see in mammals is an independent innovation all related to mammary glands allowing preemie young and many other features of mammals.
BTW maternal care has evolved many times independently in amphibians. But that is a different story.
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Post by Son Of Beach on Dec 30, 2021 14:10:06 GMT -5
The pic from the article.
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Post by stephan on Jan 4, 2022 0:50:40 GMT -5
In the most simplistic explanation possible, there were two major lines of evolution in the reptile world. The early lines gave rise to turtles, crocodilians, dinosaurs and birds. Maternal behavior (guarding of nests, guarding of young, and feeding of young occurs in all of these groups (especially the latter 3). Turtles are known to protect nests but are less obvious maternal care candidates. The other evolutionary line led to tuataras, snakes and lizards. While there is some parental care in some snakes and lizards, it would appear that its a secondary innovation that popped up several times and not carried from their ancient lineage. Alligators and crocodilians guard nests, guard the young, carry them around in their mouths and on their backs and respond to distress call of the young. Sounds like the maternal care we think of in birds doesn't it. There is a lot of evidence that points to similar behaviours in dinosaurs. I should point out that the maternal care we see in mammals is an independent innovation all related to mammary glands allowing preemie young and many other features of mammals. BTW maternal care has evolved many times independently in amphibians. But that is a different story. Even some insects and arachnids show post-hatching parental care and begging behavior in young.
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LazerFlash
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The more they over-think the plumbing, the easier it is to stop up the toilet.
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Post by LazerFlash on Jan 4, 2022 14:25:06 GMT -5
I'm rather ignorant on most everything paleontology so this may have a simple answer. How do they know it's not some large extinct bird in the first place? If everything about the setup inside the egg looks like a bird and has avian characteristics... Carbon-dating?
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Post by rockjunquie on Jan 4, 2022 15:00:52 GMT -5
I'm rather ignorant on most everything paleontology so this may have a simple answer. How do they know it's not some large extinct bird in the first place? If everything about the setup inside the egg looks like a bird and has avian characteristics... Carbon-dating?Carbon dating would show the age and nothing else. But, that would be helpful to know, as well. Not definitive, but enough to help place it in time.
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Post by stephan on Jan 6, 2022 20:19:35 GMT -5
Carbon dating would show the age and nothing else. But, that would be helpful to know, as well. Not definitive, but enough to help place it in time. Age would be part of the puzzle (if it's 60M years or younger, it could be a bird), but there are phylogenetic differences: Reptiles tend to have leathery egg cases; bird eggs are hard-shelled Birds tend to have larger brain-cases Reptiles tend to have larger clutches of eggs Birds often (but not always) have only one ovary That said, some now classify birds as endothermic ("warm-blooded") reptiles, but that would be hard to tell from a fossil.
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