The Mesozoic Era lasted approximately 185.5 million years; it began around 251 million years ago with the Triassic Period, and it remained until 65.5 million years ago with the end of the Cretaceous Period. The Mesozoic Era contained three distinct time periods: the Jurassic Period followed the Triassic Period, spanning a time frame of 199.6 to 145.5 million years ago, while the Cretaceous Period ended the Mesozoic Era.Know More
The term mesozoic means "middle animals." New animals and vegetation arrived during the course of the Mesozoic Era. Several species of dinosaurs emerged during the Triassic Period, but dinosaur diversity occurred later in the Jurassic Period. However, dinosaurs enjoyed only a brief growth in population. With the exception of several bird species, dinosaurs' numbers dwindled; many species failed to exist following the Cretaceous Period.
According to researchers at the University of California Museum of Paleontology, the last dinosaur remains from the Mesozoic Era appeared in modern-day Montana. While dinosaurs fared poorly during the Mesozoic Period, vegetation blossomed. Plants and flowers appeared in larger numbers on land and in water. Common plants, including ferns and cycads emerged during that time, along with early ancestors of modern conifers and angiosperms. Fossils from the Mesozoic Era exist around the world in places like the United States, Germany, Argentina and Ethiopia.Learn more about Ancient History
The Precambrian Era is the oldest period of history on Earth. This era comprises about 88 percent of Earth's total geologic existence. It is the period between Earth's formation and the development of primitive multicelled organisms.Full Answer >
The Precambrian era covers the creation of Earth up until the emergence of multi-celled life forms. The Precambrian accounts for roughly seven-eighths of Earth's history or approximately 4 billion years. The conclusion of this period came 570 million years ago, when the Earth's crust formed and complex life first took form in the seas.Full Answer >
Occurring 299 to 251 million years ago, the Permian Era was a time of great change. The Earth was covered by massive areas of land and water. The landmass was punctuated by dry interior regions with great seasonal fluctuations. Glaciers receded as the interior regions became dryer.Full Answer >
The Mesozoic Era is also known as the Age of Reptiles or the Age of Dinosaurs. During the era, dinosaurs were the Earth's dominant form of life.Full Answer >