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The extinction symbol with an X-shaped pictogram of an hourglass.The letter X stands for the first syllable of the word "extinction" Flag with the extinction symbol. The extinction symbol represents the threat of holocene extinction on Earth; a circle represents the planet and a stylised hourglass is a warning that time is running out for many species.
English: The symbol represents extinction. The circle signifies the planet, while the hourglass inside serves as a warning that time is rapidly running out for many species. The circle signifies the planet, while the hourglass inside serves as a warning that time is rapidly running out for many species.
In 2012, he predicted the "likely" extinction of humanity by 2030 due to climate-change, and mass die-off by 2020 "for those living in the interior of a large continent". [18] In 2018, he was quoted as saying "Specifically, I predict that there will be no humans on Earth by 2026", which he based on "projections" of climate-change and species loss.
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Rising extinction rates over the Holocene's millennia are mainly due to increasing human activities. See also the preceding Category:Pleistocene extinctions The main article for this category is Holocene extinction .
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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.
In Our Final Hour, Rees explores various risks of human extinction and their likelihood, notably those caused by the unchecked consequences of new technologies (such as nanotechnology or machine superintelligence), uncontrolled scientific experimentation, terrorist or fundamentalist violence, or destruction of the biosphere. [4]