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5 giorni fa · Species that are not globally extinct are termed extant. Those species that are extant, yet are threatened with extinction, are referred to as threatened or endangered species. The dodo of Mauritius, shown here in a 1626 illustration by Roelant Savery, is an often-cited example of modern extinction.
1 giorno fa · Their closest extant relatives are the sirenians (dugongs and manatees) and the hyraxes, with which they share the clade Paenungulata within the superorder Afrotheria. Elephants and sirenians are further grouped in the clade Tethytheria.
3 giorni fa · Estimates of the number of major mass extinctions in the last 540 million years range from as few as five to more than twenty. These differences stem from disagreement as to what constitutes a "major" extinction event, and the data chosen to measure past diversity.
13 mag 2024 · This mass extinction event caused about 20 percent of marine families and some 76 percent of all extant species to die out, possibly within a span of about 10,000 years, thus opening up numerous ecological niches into which the dinosaurs evolved.
2 giorni fa · The killing and hunting of these birds, combined with the degradation of forests, led to the decline of the bird population. By the 1920s, the Carolina parakeet was extinct. The above image from the Oklahoma Museum shows the dead Carolina Parakeet collected in the 1880s. 3. Bachman’s Warbler (Vermivora bachmanii)
14 mag 2024 · The scientists quickly realize that they’re not alone. Something is hunting them inside the buried tomb, a creature that has evolved to live in complete darkness, an extant species that will stop at nothing to make sure that no one ever learns of its existence, because in the end… NATURE ALWAYS FINDS A WAY. Genre: Mystery
7 mag 2024 · Although no insects have reached the size of the massive griffinflies since the Paleozoic Era, there are still a few extant species of insects that are big enough to give even seasoned ...
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