Pleistocene
Humans first appeared in the Paleolithic era, around 2.5 million years ago. This era is characterized by the use of stone tools and the development of early human species like Homo habilis and Homo erectus.
Homo sapiens first appeared during the Upper Paleolithic period, approximately 300,000 to 200,000 years ago. This era is characterized by the emergence of fully modern humans with advanced cognitive abilities, artistic expressions, and more sophisticated tool-making techniques.
Geological time periods are divided into Eons, Eras, Periods, and Epochs, sorted respectively in length. Officially there are only three eras of geological time. Before the named eras is the Precambrian time period, which is only divided up into three eons; the Hadean (4.6 - 4 billion years ago), the Archean (4 - 2.5 billion years) , and the Proterozoic (2.5 billion to 545 million years ago). For eras next is the Paleozoic Era, which ranges from 545 million years to 245 million years ago. The first fish and first land plants occured, as well as the first amphibians followed by the first reptiles. Right at the end the first dinosaurs evolved. The next era is the Mesozoic, a short one. This was the dinosaur's era, for it contained the Triassic, the Jurassic, and the Cretaceous Periods. It was during the Triassic that Pangea first broke up. Towards the end of the Cretaceous Period, Most of the dinosaurs were extinct. It was in the Mesozoic Era that the first mammals appeared. Finally we have the Cenozoic Era, which ranges from 66 million years ago to the present day. In this era most of the mountain ranges formed which we know today, and also the Ice Age occured. epochs and periods {apex}
No! During the Paleozoic, Earth saw the first fishes, amphibians, & reptiles-- not humans. Humans didn't appear on Earth until the Cenozoic Era (and even then, it's more towards the end of the Cenozoic than the beginning of the Cenozoic Era that they appeared). So don't let Flintstones and similar things fool you-- humans haven't been around since the beginning of the world.
Paleolithic age
The Paleozoic Era was the second in geological time. It was between 541 to 251 million years ago. Phyla, fish, arthropods reptiles and amphibians all evolved during the Paleozoic era. The end of the Paleozoic period ended with the largest mass extinction in history.
probably mesozoic era
Vertebrates first appeared during the Paleozoic era.
Mammals first appear in the fossil record of the Mesozoic Era.
Cenozoic Era
paleozoic era
Jurassic, after the location.
the cenozoic era
We are currently in the Quaternary period, which is the most recent geological period within the Cenozoic era. The Quaternary period began approximately 2.6 million years ago and is characterized by the presence of ice ages and the evolution of early humans.
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Samples from the early Precambrian era are rare due to geological processes such as erosion, metamorphism, and plate tectonics that have destroyed or buried the rocks from that time period. Additionally, the rocks from the early Precambrian era are often heavily altered, making it difficult to study and obtain accurate data from them.
Cycads first appeared in the fossil record during the early Permian period, around 280 million years ago. They are often referred to as "living fossils" due to their ancient lineage and resemblance to plants from that era.