Results 301 to 310 of about 373,057 (342)
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Mites as fossils: forever small?
International Journal of Acarology, 2018Smallness being in the essence of a mite, the question is whether it has always been so during the geological history of Acari. Here I assemble measurements of over 260 published mite fossils, distributed from the Early Devonian (410 mya) to the end of ...
E. Sidorchuk
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Are the oldest ?fossils?, fossils?
Origins of Life, 1976A comparative statistical study has been carried out on populations of modern algae, of Precambrian algal microfossils, of the 'organized elements' of the Orgueil carbonaceous meteorite, and of the oldest microfossil-like objects now known (spheroidal bodies from the Fig Tree and Onverwacht Groups of the Swaziland Supergroup, South Africa).
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Dead, fossil or alive: Bioapatite diagenesis and fossilization
Palaeogeography, Palaeoclimatology, Palaeoecology, 2021Calcium carbonate, silica and calcium phosphate have been selectively used by organisms in the production of mineralized hard parts throughout the Phanerozoic. Among these materials, bioapatite has enabled fundamental acquisitions in the evolution of life.
Ferretti A. +4 more
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2015
The origin of fossils After an animal dies, its behavior immediately stops. Of course! Thus, behavior is the first component of the phenotype to be lost. After this, DNA and soft tissues are also rapidly lost. Large and small animals may eat or scavenge the carcass, dismembering the body, stripping away flesh, and breaking open bones that are rich in
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The origin of fossils After an animal dies, its behavior immediately stops. Of course! Thus, behavior is the first component of the phenotype to be lost. After this, DNA and soft tissues are also rapidly lost. Large and small animals may eat or scavenge the carcass, dismembering the body, stripping away flesh, and breaking open bones that are rich in
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Comparative Biochemistry and Physiology, 1967
Abstract 1. 1. Lipid components such as fatty acid esters, cholesterol esters, free fatty acids and phospholipids (phosphatidyl ethanolamine and lecithin) were found in well-preserved fossil bones of Pleistocene age. 2. 2. Half the older specimens (to Paleozoic) contained fatty acids and two still retained phosphatidyl ethanolamine. 3. 3.
Salil K Das +2 more
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Abstract 1. 1. Lipid components such as fatty acid esters, cholesterol esters, free fatty acids and phospholipids (phosphatidyl ethanolamine and lecithin) were found in well-preserved fossil bones of Pleistocene age. 2. 2. Half the older specimens (to Paleozoic) contained fatty acids and two still retained phosphatidyl ethanolamine. 3. 3.
Salil K Das +2 more
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Scientific American, 2005
This article comments on the persistence of the creationism argument despite the multifarious evidence supporting evolution. Nineteenth-century English social scientist Herbert Spencer made this prescient observation: "Those who cavalierly reject the Theory of Evolution, as not adequately supported by facts, seem quite to forget that their own theory ...
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This article comments on the persistence of the creationism argument despite the multifarious evidence supporting evolution. Nineteenth-century English social scientist Herbert Spencer made this prescient observation: "Those who cavalierly reject the Theory of Evolution, as not adequately supported by facts, seem quite to forget that their own theory ...
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2019
The Nigerian Field, 41 (2), 55 ...
Halstead, Lambert B, Middleton, Jennifer
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The Nigerian Field, 41 (2), 55 ...
Halstead, Lambert B, Middleton, Jennifer
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Nature, 1874
WHEN examining the great exposure of trap and associated Upper Silurian rocks at Cape Bon Ami, New Brunswick, I unexpectedly found fossils in the trap. I was at the time collecting agates and amygdals of calcite. One amygdal attracted my attention as singularly regular in shape.
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WHEN examining the great exposure of trap and associated Upper Silurian rocks at Cape Bon Ami, New Brunswick, I unexpectedly found fossils in the trap. I was at the time collecting agates and amygdals of calcite. One amygdal attracted my attention as singularly regular in shape.
openaire +2 more sources
New fossils from Jebel Irhoud, Morocco and the pan-African origin of Homo sapiens
Nature, 2017J. Hublin +10 more
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