Q:

Why did the dinosaurs become extinct?

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Quick Answer

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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Full Answer

Over the years, there have been many theories and speculations about why dinosaurs went extinct. As more fossils are attained and technology allows science to advance further, palaeontologists have new theories. A persistent theory is that the sunlight was blocked by a large meteorite that crashed into the Earth. Without the sun, plants were unable to grow, and plant-eating dinosaurs would have died without a proper food source. Without herbivore dinosaurs, the carnivore dinosaurs also lose their food source.

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Related Questions

  • Q:

    Why are dinosaurs extinct?

    A:

    There are a few well-researched theories about why dinosaurs are extinct; one of the most prominent theories hypothesizes that a massive asteroid impact killed off the dinosaurs. Another states that heavy volcanic eruptions across the Earth may have been responsible.

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  • Q:

    Were there any dinosaurs that swam?

    A:

    True dinosaurs were not swimmers. There were a number of very large aquatic reptiles that lived during the age of the dinosaur, but they were not technically dinosaurs. These creatures belonged to one of several other groups, such as ichthyosaurs, plesiosaurs and mosasaurs, which were types of marine reptiles.

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  • Q:

    How did the ankylosaurus become extinct?

    A:

    The ankylosaurus became extinct with the other great dinosaurs during the Cretaceous-Paleogene extinction event that occurred about 66 million years ago. While some questions remain about what caused this extinction, geologic evidence suggests that at least one massive asteroid or comet impacted the Earth, sending shock waves through the atmosphere and drastically changing the climate.

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  • Q:

    How did the Triceratops become extinct?

    A:

    There are numerous theories regarding the extinction of the dinosaurs, including the triceratops, at the end of the Cretaceous period. The most prevalent theory describes the sudden destruction of the dinosaurs, and 50 to 75 percent of the planet's flora and other fauna, being due to a huge asteroid impact that dramatically altered the environment. However, despite strong evidence, there is no conclusive proof, explains the Smithsonian Institution.

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