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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 book's title is similar to a 1995 book title, The Sixth Extinction by Richard Leakey and Roger Lewin. Also included are excerpts from interviews with a forest ecologist , atmospheric scientist Ken Caldeira , wildlife and conservation experts, a modern-day geologist, and fungus researchers in New England and New York State .
An area of current investigation in evolutionary developmental biology is the developmental basis of adaptations and exaptations. [187] This research addresses the origin and evolution of embryonic development and how modifications of development and developmental processes produce novel features. [188]
Did one or more random events lead to the first eukaryotic cells, or can the formation of eukaryotic cells be explained by physical and biological principles? How did the mitochondria's mitosis cycle come in sync with its host cell?
The journal includes research articles, various types of review articles, as well as an editorial magazine section. The journal was established in 1991 [1] by the Current Science group, acquired by Elsevier in 1998 and has since 2001 been part of Cell Press, a subdivision of Elsevier. [2] According to Journal Citation Reports, the journal has a ...
Actionbioscience - sponsored by the American Institute of Biological Sciences (AIBS) -- providing articles by scientists, science educators, and science students on issues related to seven bioscience challenges: environment, biodiversity, genomics, biotechnology, evolution, new frontiers in science, and bioscience education
One mechanism, involved “systemic mutations”, rejected the classical gene concept and is no longer considered by modern science; however, his second mechanism involved “developmental macromutations” in “rate genes” or “controlling genes” that change early development and thus cause large effects in the adult phenotype.
July 2020 in science; July: The UAE, [1] China, [2] and the United States [3] launch probes to Mars.. 1 July Scientist at CERN report that the LHCb experiment has observed a four-charm tetraquark particle never seen before, which is likely to be the first of a previously undiscovered class of particles.