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Mass extinctions are characterized by the loss of at least 75% of species within a geologically short period of time (i.e., less than 2 million years). [18] [51] The Holocene extinction is also known as the "sixth extinction", as it is possibly the sixth mass extinction event, after the Ordovician–Silurian extinction events, the Late Devonian extinction, the Permian–Triassic extinction ...
The extinctions during the Late Pleistocene are differentiated from previous extinctions by its extreme size bias towards large animals (with small animals being largely unaffected), and widespread absence of ecological succession to replace these extinct megafaunal species, [3] and the regime shift of previously established faunal ...
On Marion Island in 2007, some 250–300 adult male subantarctic fur seals died in a two-week period. It was suggested, though not proven, that this gender-biased mortality was caused by Streptococcus sanguinis, a bacterium carried by the house mouse, an alien species accidentally introduced to the island in the 1800s.
For some species bringing new life into the world also serves as a final act. Here are 10 animal mothers that die after giving birth.
The paradox predates Buridan; it dates to antiquity, being found in Aristotle's On the Heavens. [4] Aristotle, in ridiculing the Sophist idea that the Earth is stationary simply because it is spherical and any forces on it must be equal in all directions, says that is as ridiculous as saying that [4]
In 2022, animal rights activist and philosopher Oscar Horta included a chapter titled "In defense of animals!" in his book Making a Stand for Animals, arguing for moral consideration and assistance for animals suffering from natural processes. [129] Johannsen has edited Positive Duties to Wild Animals, a collection of essays from various ...
The "Great Dying" had enormous evolutionary significance: on land, it ended the primacy of early synapsids. The recovery of vertebrates took 30 million years, [18] but the vacant niches created the opportunity for archosaurs to become ascendant. In the seas, the percentage of animals that were sessile (unable to move about) dropped from 67% to ...
Author Jesse Andrews, whose 2012 novel “Me and Earl and the Dying Girl” became the 10th-most-banned book in America last year, questions the real harm of exposing young people to books.