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A couple things that we do know about theropods—the ones that most closely related to birds—is that they brooded their nests. If you go deeper in the… - Mark Norell
" "A couple things that we do know about theropods—the ones that most closely related to birds—is that they brooded their nests. If you go deeper in the tree, what you see is that for sauropods, we have no direct evidence that they returned to the nest after the eggs were laid. Most of the evidence for that comes from an excavation in Argentina called Auca Mahuevo. What’s thought with sauropods is that they’d just lay a bunch of eggs and leave them alone—the turtle model. Few of those would ever reach adulthood.
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About Mark Norell
Mark Norell (July 26, 1957 – September 9, 2025) was an American paleontologist and molecular geneticist, acknowledged as one of the most important living vertebrate paleontologists. He was recently the chairman of paleontology and a research associate at the American Museum of Natural History. He is best known as the discoverer of the first theropod embryo and for the description of feathered dinosaurs.
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Mark Allen Norell
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Mark A. Norell
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The more that we learn about these animals the more we find that there is basically no difference between birds and their closely related dinosaur ancestors like velociraptor. Both have wishbones, brooded their nests, possess hollow bones, and were covered in feathers. If animals like velociraptor were alive today our first impression would be that they were just very unusual looking birds.
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