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The timeline of human evolution outlines the major events in the evolutionary lineage of the modern human species, Homo sapiens, throughout the history of life, beginning some 4 billion years ago down to recent evolution within H. sapiens during and since the Last Glacial Period.
At long irregular intervals, Earth's biosphere suffers a catastrophic die-off, a mass extinction, [9] often comprising an accumulation of smaller extinction events over a relatively brief period. [10] The first known mass extinction was the Great Oxidation Event 2.4 billion years ago, which killed most of the planet's obligate anaerobes.
Humans [3] Quaternary extinction event: 640,000, 74,000, and 13,000 years ago: Unknown; may include climate changes, massive volcanic eruptions and Humans (largely by human overhunting) [4] [5] [6] Neogene: Pliocene–Pleistocene boundary extinction: 2 Ma: Possible causes include a supernova [7] [8] or the Eltanin impact [9] [10] Middle Miocene ...
The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. [1] [2] [3] The similarities among all known present-day species indicate that they have diverged through the ...
Analyses of the modern human genomes indicate past interbreeding with at least two groups of archaic humans, Neanderthals [55] and Denisovans, [25] [56] and that such interbreeding events occurred on multiple occasions. Comparisons of the Denisovan, Neanderthal, and modern human genomes have revealed evidence of a complex web of interbreeding ...
Other lineages of ancient humans also went extinct around 40,000 years ago and disappeared just like the Neanderthals ultimately did, said Johannes Krause, director at the department of ...
Scientists are one step closer to solving the mystery of humanity's last great extinction: why the Neanderthals died off. The Neanderthals are our closest ancient human relatives. But around ...
The Neanderthal DNA found in modern human genomes has long raised questions about ancient interbreeding. New studies offer a timeline of when that occurred and when ancient humans left Africa.