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Anatomically modern humans appear in Africa. [103] [104] [105] Around 50 ka they start colonising the other continents, replacing Neanderthals in Europe and other hominins in Asia. 70 ka Genetic bottleneck in humans (Toba catastrophe theory). 40 ka Last giant monitor lizards (Varanus priscus) die out. 35-25 ka Extinction of Neanderthals.
The Holocene is considered to have started with the Holocene glacial retreat around 11650 years Before Present (c. 9700 BC). It is characterized by a general trend towards global warming , the expansion of anatomically modern humans ( Homo sapiens ) to all emerged land masses, the appearance of agriculture and animal husbandry , and a reduction ...
List of extinct animals of Romania; List of fossil species in the La Brea Tar Pits, California, United States; List of fossil species in the London Clay, England; List of White Sea biota species by phylum, Russia; Paleobiota of the Hell Creek Formation, northern United States; Paleobiota of the Morrison Formation, western United States
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 ...
The wild population died out in 1988 after a valve control system for surface discharge was installed in the spring and subsequently closed. Captive-bred animals were released in the same place in 1989, and further introduced to locations in New Mexico beginning in 1990. [116]
Prehistoric animals of the Pleistocene epoch, existing between 2.58 million and 11.7 thousand years ago, during the early Quaternary Period of the Cenozoic Era See also the preceding Category:Pliocene animals
The hyperdisease hypothesis proposes that humans or animals traveling with them (e.g., chickens or domestic dogs) introduced one or more highly virulent diseases into vulnerable populations of native mammals, eventually causing extinctions. The extinction was biased toward larger-sized species because smaller species have greater resilience ...
Animals in the water column are almost entirely dependent on primary production from living phytoplankton, while animals on the ocean floor always or sometimes feed on detritus. [35] Coccolithophorids and mollusks (including ammonites , rudists , freshwater snails , and mussels ), and those organisms whose food chain included these shell ...