Portal:Paleontology - Wikipedia
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Introduction
Paleontology ( PAY-lee-on-TOL-ə-jee, PAL-ee-, -ən-), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossils to classify organisms and study their interactions with each other and their environments (their paleoecology). Paleontological observations have been documented as far back as the 5th century BC. The science became established in the 18th century as a result of Georges Cuvier's work on comparative anatomy, and developed rapidly in the 19th century. The term has been used since 1822 formed from Greek παλαιός ('palaios', "old, ancient"), ὄν ('on', (gen. 'ontos'), "being, creature"), and λόγος ('logos', "speech, thought, study").
Paleontology lies on the border between biology and geology, but it differs from archaeology in that it excludes the study of anatomically modern humans. It now uses techniques drawn from a wide range of sciences, including biochemistry, mathematics, and engineering. Use of all these techniques has enabled paleontologists to discover much of the evolutionary history of life, almost back to when Earth became capable of supporting life, nearly 4 billion years ago. As knowledge has increased, paleontology has developed specialised sub-divisions, some of which focus on different types of fossil organisms while others study ecology and environmental history, such as ancient climates. (Full article...)
Selected article on the prehistoric world and its legacies
Tiktaalik is a monospecific genus of extinct sarcopterygian (lobe-finned fish) from the late Devonian period, about 375 Ma (million years) ago, having many features akin to those of tetrapods (four-legged animals).
Tiktaalik has a possibility of being a representative of the evolutionary transition from fish to amphibians. It is an example from several lines of ancient sarcopterygian fish developing adaptations to the oxygen-poor shallow-water habitats of its time, environmental conditions which led to the evolution of tetrapods.
It and similar animals may possibly be the common ancestors of the broad swath of all terrestrial fauna: amphibians, reptiles, birds, and mammals. The first well-preserved Tiktaalik fossils were found in 2004 on Ellesmere Island in Nunavut, Canada. (see more...)
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The following are images from various paleontology-related articles on Wikipedia.
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Johann Jakob Scheuchzer tried to explain fossils using Biblical floods in his Herbarium of the Deluge (1709). (from History of paleontology)
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A drawing comparing jaws was added in 1799 when Cuvier's 1796 presentation on living and fossil elephants was published. (from History of paleontology)
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Fossil of the Taung child discovered in South Africa in 1924 (from History of paleontology)
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Illustration of the fossil jaw of the Stonesfield mammal from Gideon Mantell's 1848 Wonders of Geology (from History of paleontology)
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Geologic time scale from an 1861 book by Richard Owen shows the appearance of major animal types. (from History of paleontology)
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Photograph of the second Archaeopteryx skeleton to be found, taken in 1881 at the Natural History Museum, Berlin (from History of paleontology)
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Duria Antiquior – A more Ancient Dorset is a watercolor painted in 1830 by the geologist Henry De la Beche based on fossils found by Mary Anning. The late 18th and early 19th century was a time of rapid and dramatic changes in ideas about the history of life on earth. (from History of paleontology)
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Philippe-Charles Schmerling (from List of paleontologists)
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Illustration from William Smith's Strata by Organized Fossils (1817) (from History of paleontology)
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Illustration of fossil Iguanodon teeth with a modern iguana jaw for comparison from Mantell's 1825 paper describing Iguanodon (from History of paleontology)
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First mention of the word palæontologie, as coined in January 1822 by Henri Marie Ducrotay de Blainville in his Journal de physique (from History of paleontology)
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Illustration from Steno's 1667 paper shows a shark head and its teeth along with a fossil tooth for comparison. (from History of paleontology)
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Diagram by O.C. Marsh of the evolution of horse feet and teeth, reproduced in T. H. Huxley's 1876 book, Professor Huxley in America (from History of paleontology)
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Selected article on paleontology in human science, culture and economics
William Beebe was an American naturalist, ornithologist, marine biologist, entomologist, explorer, and author. He is remembered for the numerous expeditions he conducted for the New York Zoological Society, his deep dives in the Bathysphere, and his prolific scientific writing for both academic and popular audiences.
Born in Brooklyn, New York Beebe left college before obtaining a degree in order to work at the then newly opened New York Zoological Park, where he was given the duty of caring for the zoo's birds. Beebe participated in a series of research expeditions, including one intended to document the world's pheasants. He published an account of his pheasant expedition titled A Monograph of the Pheasants.
During the course of his expeditions Beebe gradually developed an interest in marine biology, ultimately leading to his 1930s dives in the Bathysphere off the coast of Bermuda. These dives represented the first time a biologist observed deep-sea animals in their native environment. Later, Beebe returned to the tropics and founded a tropical research station which remains in operation as part of the Asa Wright Nature Centre. Beebe's research there continued until his death in 1962.
He is also remembered for several theories he proposed about avian evolution which are now regarded as having been ahead of their time, particularly his 1915 hypothesis that the evolution of bird flight passed through a four-winged or "Tetrapteryx" stage, which has been supported by the 2003 discovery of Microraptor gui. (see more...)
On this day...
October 8:
- 1832 - During the second voyage of the HMS Beagle, Charles Darwin returned to the site of his September 23rd discovery of a large fossil mammal skull in the Punta Alta, Argentina area, which he recognized as the remains of a giant ground sloth.
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