Q:

Did all dinosaurs lay eggs?

A:

Quick Answer

All dinosaurs laid eggs, which were fertilized through sexual reproduction between a male and a female. There is evidence that some species of dinosaurs cared for their young during incubation and after hatching.

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Full Answer

Scientists have long asserted that dinosaurs are the ancestors of modern birds, and like modern birds, female dinosaurs laid eggs after mating with a male. Following incubation, during which time the eggs may or may not have received direct parental care through body warmth and protection, scientists have found evidence that – depending on the species – the hatchlings could either remain with the parents or leave the nest to fend for themselves.

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Related Questions

  • Q:

    What did dinosaurs eat?

    A:

    There is evidence that dinosaurs did not have a single, uniform and universal diet but rather a wide variety of dietary habits, with evidence supporting the idea that carnivorous, herbivorous and omnivorous species all existed. Different feeding styles were also likely, with some carnivorous species hunting prey such as mammals and small reptiles, while other carnivores may have been opportunistic carrion scavengers. There was likely even a good range of dietary variety amongst the herbivorous dinosaurs, which may have made up the majority of all dinosaur species.

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  • Q:

    Why did the dinosaurs become extinct?

    A:

    There is not sufficient proof as to why dinosaurs went extinct, but experts believe it is related to geological events, diseases, climate change and lack of plant life for sustenance. The last known dinosaurs, according to their fossils, existed about 65 million years ago.

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  • Q:

    Are there animals alive today that lived beside dinosaurs?

    A:

    There are some animals on earth that can be traced back to the Mesozoic Era when dinosaurs walked the earth; these animals include monotremes such as the duckbill platypus, reptiles such as the crocodilians and sea creatures such as the sea urchin. For the most part, the animals that are alive today have made evolutionary changes from the forms they had when dinosaurs were alive. For example, though the event that caused dinosaurs to die out also killed many other reptile species, several surviving reptile species have direct ancestors from that era, including the crocodilians, which are smaller than their Mesozoic ancestors.

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  • Q:

    How long ago did dinosaurs die out?

    A:

    The purported mass dinosaur die off known as the K-Pg extinction event took place during the end of the Cretaceous Period (K) during the Mesozoic Era some 65 million years ago. This scientific theory is based on the study of the fossil record, which shows evidence for the existence of dinosaurs during the Mesozoic Era but not during the proceeding Cenozoic Era. There is a clear line of demarcation, an actual line found in sedimentary rock layers known as the K-Pg Boundary, with the majority of the fossilized remains found below this line belonging to the "Age of Dinosaurs" not appearing in the space above the line, which marks the beginning of the Paleogene Period (Pg), the Cenozoic Era and the "Age of Mammals."

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