| That makes the famous mass extinction that wiped out the dinosaurs some 65 million years ago seem like a minor die-off. |
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| They found that the mass extinction occurred 46,400 years ago, give or take 3,000 years. |
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| Marine fossil evidence tells of numerous extinctions, global mass extinction, and geochemical events. |
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| Carnivores, species at the top of the food chain, are in danger of a mass extinction that would affect all species within their ecosystems. |
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| By coinciding, however, they did result in a distinct drop in diversity and thus in a mass extinction. |
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| After many decades of debate, the North American end-Pleistocene megafaunal mass extinction remains a lightning rod of controversy. |
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| It is biogeochemistry that lends substance to the hypothesis that Ediacaran and Cambrian faunas are separated by mass extinction. |
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| A million years before a mass extinction event, the corals vanish, more or less. |
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| Frans Witte and Kees Barel document the mass extinction of haplochromine cichlids in Lake Victoria, Africa. |
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| These and many other animal groups perished in a cataclysmic mass extinction 65 million years ago. |
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| Scientists define a mass extinction as a period of less than two million years in which at least 75 percent of species go extinct. |
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| Some biologists today believe there are signs of a sixth mass extinction, triggered by man's extensive interventions in the natural regime. |
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| Environmentalists were furious, saying that the plan would lead to the mass extinction of the snake population. |
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| During the most recent mass extinction, 65 million years ago, 17 per cent of all the taxonomic families of life were lost, including the dinosaurs. |
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| Perhaps we can adapt to global warming, and perhaps we can survive a mass extinction even of species on land. |
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| Their disappearance would represent the largest mass extinction since that of the dinosaurs. |
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| But something went terribly wrong at the end of the Permian, arguably the greatest mass extinction in Earth history. |
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| The previous mass extinction, the Cretaceous-Tertiary event, which ended the era of the dinosaurs, occurred 65 million years ago. |
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| A huge structure off of Australia's northwest coast has been identified by researchers as an ancient impact crater, and blamed for a mass extinction in the fossil record. |
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| Ever since the proposal that the mass extinction resulted from a bolide impact, the nature of mass extinctions has been the subject of much debate. |
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| Some of the groups of sea life survived this mass extinction but they never recovered their large populations again. |
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| According to some scientists, we are in the middle of the sixth mass extinction in geological history. |
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| The Medean world is one out of balance, where over competition leads to mass extinction. |
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| Many view it as the sixth mass extinction to hit planet Earth, but this one is quite different. |
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| It cannot be, it must not be the century that allows the mass extinction of languages and cultures. |
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| At that time life was confined to the oceans. 60 million years later there was a worldwide mass extinction. |
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| These are the people operating huge vessels, travelling great distances, employing relatively few people but hovering up the fish in vast quantities, bringing about the mass extinction of the fish in the seas. |
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| Biodiversity is declining rapidly worldwide, so much so that some scientists fear that we are heading for a mass extinction event similar to several that have occurred in Earth's ancient past. |
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| We witness with concern the mass extinction of bees, with hives falling silent one after another, and many species of plants dependent on pollination perishing with them. |
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| The following year, he prophesized, millions of devil spirits, together with massive flooding, would result in a mass extinction of the human population. |
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| Each kind lived during the Ordovician mass extinction that began about 445 million years ago, but only neograptines survived. |
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| This is a striking departure from the conventional view of the Anthropocene as an ecocatastrophe, a kind of mass extinction event. |
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| Biblical Armageddon parallels mass extinction. |
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| A sixth mass extinction, therefore, is beginning. |
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| Biodiversity is reaching mass extinction rates. |
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| The next mass extinction may have already begun. |
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| Will we be the cause of the sixth mass extinction on our planet? |
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| The link between a volcanic eruption and mass extinction is often difficult to establish as it is generally based on the CO2 produced as a result of the eruption. |
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| Epochal volcanism and climatic changes 20 million years ago forced a mass extinction. |
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| The markers are consistent with a mass extinction, or with a massive warming resulting from the release of methane ice. |
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| It could, therefore, not be the immediate cause of the observed mass extinction. |
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| This dramatic rise in diversity was marked by periodic, massive losses of diversity classified as mass extinction events. |
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| In the history of the Earth, biodiversity has gone through long periods of expansion, occasionally punctuated by mass extinction events. |
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| However, the Permian extinction at 252 Mya greatly impacted these insects in mass extinction, being the only mass extinction to affect insects. |
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| Global warming as a cause of mass extinction is supported by several recent studies. |
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| New dating of the Popigai meteor suggests it may be a cause of the mass extinction. |
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| As such, birds were the only dinosaur lineage to survive the mass extinction event. |
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| Microfossils found in rocks deposited during Earth's largest mass extinction may be the spores of very hardy fungi, a new study hints. |
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| The Cretaceous ended 65 million years ago, the time of the mass extinction that wiped out dinosaurs and most birds. |
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| As one of the scientists who discovered that dinosaurs went extinct when an asteroid struck Earth, he contemplates the chances of a mass extinction today. |
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| The warm climate and floods of the Devonian period produced fishes, ammonoids, and reefs but it also accommodated two of the biggest mass extinction events ever. |
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| Rates of decline in biodiversity in this sixth mass extinction match or exceed rates of loss in the five previous mass extinction events in the fossil record. |
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| The Ediacaran biota suffered a mass extinction at the start of the Cambrian Period, which corresponded to an increase in the abundance and complexity of burrowing behaviour. |
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| The Holocene extinction event is an ongoing mass extinction associated with humanity's expansion across the globe over the past few thousand years. |
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| These extinctions have happened continuously throughout the history of life, although the rate of extinction spikes in occasional mass extinction events. |
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| Now, for the first time, scientists have observed the same dynamics in the fossil record, thanks to a mass extinction that decimated ocean life 360 million years ago. |
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