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Nuclear war is an often-predicted cause of the extinction of humankind. [1]Human extinction is the hypothetical end of the human species, either by population decline due to extraneous natural causes, such as an asteroid impact or large-scale volcanism, or via anthropogenic destruction (self-extinction), for example by sub-replacement fertility.
Humans play a key role in the biosphere, with the large human population dominating many of Earth's ecosystems. [3] [18] This has resulted in a widespread, ongoing mass extinction of other species during the present geological epoch, now known as the Holocene extinction.
The largest extinction was the Kellwasser Event (Frasnian - Famennian, or F-F, 372 Ma), an extinction event at the end of the Frasnian, about midway through the Late Devonian. This extinction annihilated coral reefs and numerous tropical benthic (seabed-living) animals such as jawless fish, brachiopods, and trilobites.
Lake Toba is the resulting crater lake. The Toba eruption (sometimes called the Toba supereruption or the Youngest Toba eruption) was a supervolcanic eruption that occurred about 74,000 years ago during the Late Pleistocene [ 2 ] at the site of present-day Lake Toba in Sumatra, Indonesia. It was the last in a series of at least four caldera ...
e. Extinction is the termination of a taxon by the death of its last member. A taxon may become functionally extinct before the death of its last member if it loses the capacity to reproduce and recover. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively.
The Vredefort impact structure is the largest verified impact structure on Earth. [ 1 ] The crater, which has since been eroded away, has been estimated at 170–300 kilometres (110–190 mi) across when it was formed. [ 2 ][ 3 ] The remaining structure, comprising the deformed underlying bedrock, is located in present-day Free State province ...
The moa in New Zealand went extinct in the mid 15th century due to overhunting and habitat destruction by the Māori people. Prior to the arrival of the Māori a century earlier, New Zealand was uninhabited by any mammal species, including humans. There is no general agreement on when the Holocene, or anthropogenic, extinction begins, and the ...
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. It includes brief explanations of the various taxonomic ranks in ...