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31 de jul. de 2019 · Learn about the two leading theories for what ended the age of the dinosaurs 66 million years ago: a giant meteor impact or massive volcanic eruptions. Explore the evidence, the challenges, and the controversies behind each hypothesis.
The Cretaceous–Paleogene (K–Pg) extinction event, also known as the Cretaceous–Tertiary (K–T) extinction, was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago. The event caused the extinction of all non-avian dinosaurs.
Hace 65 millones de años se extinguió el último dinosaurio. Los gigantescos mosasaurios y plesiosaurios en los mares y los pterosaurios en los cielos. Muchas familias de braquiópodos y esponjas de mar desaparecieron. Los restantes ammonites de concha dura se esfumaron.
14 de nov. de 2022 · ¿Qué causó la extinción de los dinosaurios? Los enormes animales prehistóricos desaparecieron del planeta hace unos 66 millones de años. Los científicos apuntan a más de un factor para la extinción masiva. Comparación de dinosaurios de los períodos Triásico, Jurásico y Cretácico. Ilustrado por ROY ANDERSEN. Por Redacción National Geographic.
Proposed causes for the extinction of dinosaurs have included everything from disease, heat waves, cold spells, faunal changes, and an asteroid collision during the K–T boundary.
Learn about the possible causes of the Cretaceous extinction that ended the age of the dinosaurs 66 million years ago. Find out how asteroid impact, volcanic eruptions and climate change may have contributed to the mass extinction.
15 de feb. de 2021 · Avi Loeb and Amir Siraj suggest that Jupiter's gravitational field and the sun's tidal force broke apart long-period comets, increasing their chance of hitting Earth. They claim that this explains the origin and composition of the Chicxulub impactor that killed the dinosaurs 66 million years ago.
