As far as we know, all dinosaurs reproduced by laying eggs, as did most other lizard-footed animals (reptiles). It is difficult to determine which dinosaur laid the eggs that have been found, as only a few dinosaur embryos have been found in fossil eggs.


Did dinosaurs lay large eggs? Some may have done, but there is a limit to the size of an egg. Larger eggs need thicker shells to support them, but how did dinosaurs reproduce?


Fiberglass Dinosaur Egg


Hatching of eggs

All dinosaurs hatched from eggs, including extinct dinosaurs and modern birds; the same is true of crocodiles, the biome most closely related to dinosaurs. Until the 1980s, fossil egg and bone finds of young dinosaurs were extremely rare, but now dinosaur eggs have been found on several continents, and fossils of hatchlings, juveniles, and adults have been found in most major groups.

One remarkable discovery was in Montana, where fossils of duck-billed dinosaurs were found, including eggs, nests, hatchlings, juveniles, and adults, which appeared together in a death collection or mass grave. The eggshells in the nest were badly broken, prompting speculation that these hatchling turtles may have crushed the eggs as they moved around the nest. Some paleontologists believe this site was a nesting site where adult dinosaurs cared for their young during the first few months after hatching.




The discovery of dinosaur eggs

One of the biggest highlights of the American Museum of Natural History's expedition in Central Asia occurred in 1923 at the Flaming Cliffs in Mongolia. It involved the discovery of eggs which, after preliminary analysis, were thought to belong to the dinosaur Protoceratops.

Paleontologists speculate that the fossil eggs at Flaming Cliffs were laid by Protoceratops because it was the most common dinosaur in the area where these eggs were found. However, in the 1990s, museum expeditions found identical eggs, one of which contained the embryo of a dinosaur-like egg-stealer - changing scientists' minds about which dinosaur had laid these eggs. It turns out that the egg stealers were the parents, not the egg stealers. 


Fiberglass Dinosaur Egg



Building nests, laying eggs

If you said "birds," you're right. If you said "crocodiles," you're also right. If you said "some kinds of dinosaurs," you're right. This nesting black oriole is demonstrating a behavior it shares with some dinosaurs. 

Common behaviors like these are evidence of common ancestry. And today, scientists are using observations of living relatives to breathe life into creatures that have been extinct for more than 65.6 million years. This includes animals like Citipati osmolskae, an egg-stealing dinosaur. 

Different species of eggs may have different colors, thicknesses, and other characteristics, depending on the environment in which they were laid. 

A complete life-support system that allows life to develop on land, the eggshell provides water and food for the developing embryo, while allowing oxygen in and carbon dioxide out. The similarity between the eggshell structures of some dinosaur groups and extant birds is now another link in the chain of evidence connecting them. 



Amazing, isn't it? In addition to birds, dinosaurs surprisingly reproduced through eggs as well. If this interests you, why not purchase one of our fossilized eggs for your home or hall? Contact us now to get a quote and GENGU will get back to you soon.


Comments
  • Kelsey:

    2023/01/08

    Hello,
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    Thank you,
    Kelsey

      Gengu:

      2023/01/09

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    2023/01/07

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      2023/01/09

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    2023/01/06

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      Gengu:

      2023/01/06

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    2023/01/05

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    Angie

      Gengu:

      2023/01/05

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    2023/01/03

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      Gengu:

      2023/01/03

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  • Matt:

    2023/01/02

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      Gengu:

      2023/01/03

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    2022/12/28

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      Gengu:

      2022/12/28

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  • Chris:

    2022/12/22

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      Gengu:

      2022/12/23

      We will contact you via business email as soon as possible, please kindly note to check.

  • Jack:

    2022/12/22

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      Gengu:

      2022/12/22

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  • Julia:

    2022/12/22

    Ho

      Gengu:

      2022/12/22

      Hi, we will contact you via business email as soon as possible, please kindly note to check.

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