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  1. Mesozoic - Wikipedia

    The Mesozoic Era[3] is the era of Earth's geological history, lasting from about 252 to 66 million years ago, comprising the Triassic, Jurassic and Cretaceous Periods.

  2. Mesozoic Era | Geology, Climate & Lifeforms | Britannica

    Mesozoic Era, second of Earth’s three major geologic eras of Phanerozoic time. Its name is derived from the Greek term for “middle life.” The Mesozoic Era began 252.2 million years ago, following the …

  3. Mesozoic | U.S. Geological Survey - USGS.gov

    Mesozoic (252-66 million years ago) means 'middle life' and this is the time of the dinosaurs. This era includes the Triassic, Jurassic, and Cretaceous Periods, names that may be familiar to you.

  4. The Mesozoic Era - University of California Museum of Paleontology

    Mesozoic means "middle animals," and is the time during which the world fauna changed drastically from that which had been seen in the Paleozoic. Dinosaurs, which are perhaps the most popular …

  5. Mesozoic Era - U.S. National Park Service

    Apr 27, 2023 · The Mesozoic Era (251.9 to 66.0 million years ago) was the "Age of Reptiles." During the Mesozoic, Pangaea began separating into the modern continents, and the modern Rocky Mountains …

  6. The Mesozoic Era: Age of Dinosaurs and Its Fascinating History

    Dec 21, 2024 · During the Mesozoic Era, dinosaurs evolved and adapted to various environments. This period saw the emergence of the first dinosaurs, their rapid diversification, and eventual dominance …

  7. What Was Earth Like During the Mesozoic Era?

    Aug 1, 2025 · The Mesozoic is divided into three periods: the Triassic, the Jurassic, and the Cretaceous. Each has its own climate, its own lifeforms, its own moments of triumph and extinction.

  8. Mesozoic Era | World of History

    Oct 24, 2024 · The Mesozoic Era is one of the most fascinating periods in Earth’s history, often called the “Age of Reptiles” or the “Age of Dinosaurs.” It spanned approximately 186 million years, starting …

  9. The Mesozoic Era - ScienceViews.com

    The Mesozoic Era is the age of the dinosaurs and lasted almost 180 million years from approximately 250 to 65 million years ago. This era includes 3 well known periods called the Triassic, Jurassic, and …

  10. Mesozoic Era: Age of the Dinosaurs - Live Science

    Jul 28, 2022 · During the Mesozoic, or "Middle Life" era, life diversified rapidly and giant reptiles, dinosaurs and other monstrous beasts roamed the Earth. The period, which spans from about 252 …