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End Ordovician: 440 million years ago, 86% of all species lost, including graptolites; Late Devonian: 375 million years ago, 75% of species lost, including most trilobites; End Permian, The Great Dying: 251 million years ago, 96% of species lost, including tabulate corals, and most trees and synapsids
Otodus megalodon (/ ˈ m ɛ ɡ əl ə d ɒ n / MEG-əl-ə-don; meaning "big tooth"), commonly known as megalodon, is an extinct species of giant mackerel shark that lived approximately 23 to 3.6 million years ago (Mya), from the Early Miocene to the Early Pliocene epochs.
Ileret – footprints of Homo erectus found at Ileret, Northern Kenya, dating to approximately 1.5 million years ago. Laetoli footprints – a line of hominid footprints, discovered at Laetoli, Tanzania by Mary Leakey in 1976, dating to approximately 3.6 million years ago. List of fossil sites (with link directory)
This is an accepted version of this page This is the latest accepted revision, reviewed on 26 February 2025. Scientific projections regarding the far future Several terms redirect here. For other uses, see List of numbers and List of years. Artist's concept of the Earth 5–7.5 billion years from now, when the Sun has become a red giant While the future cannot be predicted with certainty ...
The upper unit of the Laetolil Beds dated back 3.6 to 3.8 million years ago. The beds are dominantly tuffs and have a maximum thickness of 130 meters. No mammalian fauna were found in the lower unit of the Laetolil Beds, and no date could be assigned to this layer.
It was at the Laetoli site that she discovered hominin fossils that were more than 3.75 million years old. [citation needed] From 1976 to 1981, Leakey and her staff uncovered the Laetoli hominin footprint trail which had been tracked through a layer of volcanic ash some 3.6 million years ago. The subsequent years were filled with research at ...
Beginning in the 1930s, some of the most ancient hominin remains of the time dating to 3.8–2.9 million years ago were recovered from East Africa. Because Australopithecus africanus fossils were commonly being discovered throughout the 1920s and '40s in South Africa, these remains were often provisionally classified as Australopithecus aff. africanus. [1]
It is estimated to be 3.48 billion years old. [4] ... contains stromatolites that may have been created by bacteria 3.4 billion years ago. However, ...