The Paleozoic (/ ˌpæli.əˈzoʊ.ɪk, - i.oʊ -, ˌpeɪ -/ PAL-ee-ə-ZOH-ik, -⁠ee-oh-, PAY-; [1] or Palaeozoic) Era is the first of three geological eras of the Phanerozoic Eon. Beginning 538.8 million years …

2025年1月10日 · Paleozoic Era, major interval of geologic time that began 538.8 million years ago with the Cambrian explosion, an extraordinary diversification of marine animals, and ended …

Paleozoic (541-252 million years ago) means ‘ancient life.’ The oldest animals on Earth appeared just before the start of this era in the Ediacaran Period, but scientists had not yet discovered …

2013年6月20日 · The Paleozoic Era, which ran from 541 million to 251.9 million years ago, was a time of great change on Earth. The era began with the breakup of one supercontinent and the …

The Paleozoic is divided into six periods: the Cambrian, Ordovician, Silurian, Devonian, Carboniferous (in the U.S., this is divided into the Mississippian and Pennsylvanian Periods), …

Paleozoic Era, or Palaeozoic Era, Major interval of geologic time, c. 542–251 million years ago. From the Greek for “ancient life,” it is the first era of the Phanerozoic Eon and is followed by …

古生代 (Paleozoic era)—— 地质年代 的第3个代（第1、2个代分别是 太古代 和 元古代）。 约开始于5.7亿年前，结束于2.45亿年前。 古生代共有6个纪 (Period)，一般分为早、晚古生代。

2019年5月23日 · Learn about the periods of the Paleozoic Era, from the Cambrian Period (542–488 million years ago) to the Permian Period (297–251 million years ago).

“The Paleozoic Era (540 to 252 million years ago) was a revolutionary time for new life on Earth. But it had its ups and downs.” Some of the key highlights from the Paleozoic Era include: …

The Paleozoic Era was dominated by marine organisms, but by the middle of the era, plants and animals had evolved to live and reproduce on land, including amphibians and reptiles.