1st Homo sapiens: 23:59its a subspecies that includes current humans and previous members of the Homo sapiens species with a physical appearance consistent with their phenotypes. Its thought that anatomically modern humans inhabited Africa and dispersed to Europe and Asia in the Middle Pleistocene, approximately 100,000 years ago, in various migration movements across the Arab Peninsula. The anatomically modern human being evolved from the most primitive Homo sapiens in the Middle Paleolithic, about 315,000 years ago
1st hominids: 23:53the specific study of human evolution is the study of lineage, which incorporates all species closer to the modern human than the chimpanzee, the closest living relative. Molecular and paleontological evidence has shown that the common ancestor between Homo sapiens and Pan troglodytes. From this divergence, new species continued to emerge within the Hominine lineage, all of which are currently extinct with the exception of Homo sapiens.
Period: 66 to 1 BCE
CenozoicGuide Fossil: Numulites
Geological Events: Continental separation until the present continents are formed, the formation of the Andes mountain range ends and the formation of the Rift Valley in Africa continues.
Climate Events: Ice Age
1st angiosperms: 23:22Angiosperms are a group of spermatophytes long recognized as monophyletic due to their distinctive morphological characteristics, and whose monophilia was subsequently supported by molecular DNA analysis. In the fossil record appear in the early Cretaceous (about 130 million years ago), at which point huge amounts of fossils of very diverse species appear, as if they had appeared with all their diversity at once
Age of the birds: 23:39The birds originated from bipedal Jurassic carnivorous dinosaurs, 150-200 million years ago, and are, in fact, the only dinosaurs that survived the mass extinction produced at the end of the Mesozoic. Its evolution resulted, after strong radiation, in the more than 10,000 species today. Birds are the most diverse theropods; however, they have a great morphological homogeneity compared to mammals.
1st dinosaurs and mammals: 22:44Some of the first prehistoric mammals appeared about 165 million years ago, during the time of the dinosaurs. Mammals became the dominant group of animals after the disappearance of dinosaurs. The Acrophyseter was the prehistoric version of a sperm whale. Prehistoric mammals were groups of mammals that lived long before humans existed.
Age of the reptiles: 22:43Reptiles evolved from amphibians 300 million years ago. The success of this group of terrestrial vertebrates is largely due to the evolution of the shell of its eggs, in which the embryo has an independent water supply. This advance, as well as the development of internal fertilization, allowed reptiles to be the first vertebrates to cut their ties to water. They radiated through the landscape, diversifying rapidly and becoming the dominant way of life on the planet during the Mesozoic.
Period: 245 to 66
MesozoicGuide Fossil Ammonites
Geological Events: Pangea fracture and possible impact of a large meteorite.
Climate Events: The weather was dry, hot, and triassic. It did not have big changes
Amphibian age: 22:13It is only at the end of the Carboniferous period, about 310 to 300 million years ago, that we can comfortably refer to the first true amphibians. At the time, some genera had reached relatively monstrous sizes, a good example being Eogyrinus ("dawn tadpole"), a slender creature, similar to a crocodile that measured 15 feet head to tail, such as the one in the image
First terrestrial plants (gymnosperms): 21:48they are a group of seed-producing plants that includes conifers, cycneys, Ginkgo and gnetophytes. Gymnosperms and angiosperms together make up sperm or plants with seeds.
Age Fish 21:37The Devonic is a system and period of the geological temporal scale that belongs to the Paleozoic Age; it is divided into six periods of which the Devonic ranks fourth, following the Siluric and preceding the Carboniferous. In the oceans, primitive sharks become more numerous than during the Silurian, and the first lobed fin fish and fish appear. Large coral reefs, trilobites and brachypods remain common, and early ammonites molluscs appear.
1st most complex life forms: 9:07The first most complex life forms are trilobites, like the one in the image. Initially they were considered ancestors of crustaceans (especially terrestrial moisture suckling pig, which shares certain characteristics in common) or even all arthropods (since they were the first to appear in the fossil record). Today they are considered as an independent group, separated from the jaws and paralyzed. They appeared in the Cambrian period, at the beginning of the Paleozoic
Great explosion of life 9:10The explosion of animal life on Earth about 500 million years ago was the result of a combination of related factors rather than a single underlying cause. This important evolutionary event led to a wide range of biological innovation, including the origin of modern ecosystems, a rapid increase in animal diversity, the origin of skeletons and the first emergence of specific ways of life such as living in burrows and swimming.
Period: 540 to 245
PaleozoicGuide Fossil: Trilobites
Geological Events: Fracturing of Pannotia, important mountain ranges arise in Europe and North America. The formation of the Pangea begins.
Climate Events: Ordovician glaciation, carboniferous glaciation.
1st life forms: 4:10The first life forms appeared on earth some 3.5 billion years ago were single-celled, they were living beings made up of a single cell, like bacteria. The first single-celled lives and current bacteria are made up of a nucleusless cell, i.e. they are prokaryotes
Period: to 540
PrecambrianGuide Fossils: Estromatolitos
Geological Events: Formation of the lithosphere, hydrosphere and atmosphere. Rodinia / Pannotia formation.
Climate Events: Global glaciation, change of atmosphere (reducing to oxygenated)