how many animals have gone extinct ever?
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According to the International Union for Conservation of Nature (IUCN), 784 extinctions have been recorded since the year 1500, the arbitrary date selected to define "recent" extinctions, up to the year 2004; with many more likely to have gone unnoticed. Several species have also been listed as extinct since 2004.
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In the oceans, the K–Pg extinction killed off plesiosaurs and mosasaurs and devastated teleost fish, sharks, mollusks (especially ammonites, which became extinct), and many species of plankton. It is estimated that 75% or more of all species on Earth vanished.
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There are about 300 species of Australian animals that are endangered. This means that these animals may disappear from the face of the Earth forever. Humans are directly responsible for most recent extinctions. (Learn about extinction here.)
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But in the past 500 years or so, things have started to speed up, and it's got scientists worrying. Today, every single class of megafauna is most at risk from human hunting. ... In the past 250 years, we know that nine megafauna species have either gone extinct completely, or gone extinct in the wild.
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Of all species that have existed on Earth, 99.9 percent are now extinct. Many of them perished in five cataclysmic events. According to a recent poll, seven out of ten biologists think we are currently in the throes of a sixth mass extinction.
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Based on these proportions, the researchers estimated that approximately 1 million animal and plant species could die out, many “within decades.” Since the 16th century, humans have driven at least 680 vertebrate species to extinction, including the Pinta Island tortoise.
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A 2015 study noted that, according to the International Union for the Conservation of Nature (IUCN), just 15 marine animals had gone extinct by then, compared to 514 terrestrial animal species.
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A: An average of 137 species of life forms are driven into extinction every day in the world's tropical rainforests. The forces of destruction such as logging, cattle ranching have all contributed to the loss of millions of acres of tropical rainforest.
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But compared to the number of species which exist in the world, even taking the lowest estimates of that number, such known cases are very few. According to IUCN data, for example, only one animal has been definitely identified as having gone extinct since 2000.
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More than 27,000 species worldwide are threatened with extinction, according to the International Union for Conservation and Nature. DW looks at some of the critically endangered Asian species, whose survival is at risk.
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There are over 385 threatened species in China (according to the IUCN Red List) Giant pandas lost half their habitat between 1974 and 1989.
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There are now 41,415 species on the IUCN Red List, and 16,306 of them are endangered species threatened with extinction. This is up from 16,118 last year. This includes both endangered animals and endangered plants.
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41. How many species are endangered? According to the IUCN, there are over 30,000 endangered species.
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Our species caused 322 animal extinctions over the past 500 years, with two-thirds of those occurring in the last two centuries, according to a paper published in a special issue of the journal Science this week.
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Two events occurred that killed off 27% of all families, 57% of all genera and 60% to 70% of all species. Together they are ranked by many scientists as the second largest of the five major extinctions in Earth's history in terms of percentage of genera that became extinct.
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The scientists have published an alarming new study on the extinction rate of plants, which, they say, is far more serious than commonly assumed. Based on a comprehensive global analysis, the researchers say that at least 571 plant species have gone extinct since the mid-18th century.
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Frog Mass Extinction on the Horizon. The world has lost at least 200 frog species since the 1970s, and hundreds more will face extinction in the coming decades, according to new research published last week in the Proceedings of the National Academy of Sciences.