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River basins are dynamic environments that are always changing and reorganizing under geologic forces. New research investigates how this shape shifting influences aquatic speciation and extinction. Read this at EOS The evolution of organisms and of their environments is inherently linked. Although the understanding that the gene pool is dynamic has shaped much of our
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Long after the common ancestor of all terrestrial vertebrates crawled to land from the sea during the Late Devonian, a small fraction of their descendants returned to aquatic habitats, which has.
Aquatic Nature Evolution Shadow Grey
16 Citations 976 Altmetric Metrics Abstract Penguins lost the ability to fly more than 60 million years ago, subsequently evolving a hyper-specialized marine body plan.
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Three major stages of humerus shape evolution: from the blocky humerus of aquatic fish, to the L-shape humerus of transitional tetrapods, and the twisted humerus of terrestrial.
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Between 390 and 360 million years ago, the descendents of these organisms began to live in shallower waters, and eventually moved to land. As they did, they experienced natural selection that shaped many adaptations for a terrestrial way of life.
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The earliest fossil evidence for sharks or their ancestors are a few scales dating to 450 million years ago, during the Late Ordovician Period. Emma Bernard, a curator of fossil fish at the Museum, says, 'Shark-like scales from the Late Ordovician have been found, but no teeth. If these were from sharks it would suggest that the earliest forms.
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Discovery opens up new path in study of marine evolution and biodiversity. New UCLA research indicates that an evolutionary phenomenon never before observed among marine life could help explain why there is such immense biodiversity in the world's coral reefs and the ocean beyond. Two studies — one of reef-dwelling marine snails, the other.
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The "aquatic ape hypothesis" is one of these, now championed by Sir David Attenborough in his recent BBC Radio 4 series The Waterside Ape. The hypothesis suggests that everything from walking.
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238 Citations 262 Altmetric Metrics Abstract Although the first ten million years of whale evolution are documented by a remarkable series of fossil skeletons, the link to the ancestor of.
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Major paleontological discoveries in the past 40 years have clarified the early land-sea transitions for some marine tetrapods (e.g., whales, sea cows), although the terrestrial origins of many lineages remain obscure.
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April 16, 2012 A gorilla in the Congo wading in a swamp Image courtesy of Wikicommons The aquatic ape theory, now largely dismissed, tries to explain the origins of many of humankind's unique.
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This speed comes from 3 billion years of evolution and natural selection, allowing them to capture prey efficiently and achieve an image of dominance in the underwater ecosystem [3][4]. Though the human race places high value on speed for different reasons - convenience, efficiency, and productivity - scientists are looking to this.
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The aquatic ape hypothesis ( AAH ), also referred to as aquatic ape theory ( AAT) or the waterside hypothesis of human evolution, postulates that the ancestors of modern humans took a divergent evolutionary pathway from the other great apes by becoming adapted to a more aquatic habitat. [1]
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Going Aquatic: Cetacean Evolution March 21, 2012 All cetaceans, including whales, dolphins, and porpoises, are descendants of land-living mammals. How did these terrestrial ancestors morph over.
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Dear Editor, Long after the common ancestor of all terrestrial verte-brates crawled to land from the sea during the Late Devo-nian, a small fraction of their descendants returned to aquatic.
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Life on earth is hypothesized to have originated in the oceans 1, 2, and evolutionary transitions between marine and terrestrial environments have been essential to the origin of contemporary.
