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Thomas R. Holtz, Jr.
Thomas Richard Holtz Jr. (born September 13, 1965) is an American vertebrate palaeontologist, author, and principal lecturer at the University of Maryland's Department of Geology. He has published extensively on the phylogeny, morphology, ecomorphology, and locomotion of terrestrial predators, especially on tyrannosaurids and other theropod dinosaurs.Holtz, ''Thomas R. Holtz Jr.''. He wrote the book ''Dinosaurs'' and is the author or co-author of the chapters "Saurischia", "Basal Tetanurae", and "Tyrannosauroidea" in the second edition of ''The Dinosauria''. He has also been consulted as a scientific advisor for the ''Walking with Dinosaurs'' BBC series as well as the Discovery special '' When Dinosaurs Roamed America'', and has appeared in numerous documentaries focused on prehistoric life, such as '' Jurassic Fight Club'' on History and '' Monsters Resurrected'', '' Dinosaur Revolution'' and '' Clash of the Dinosaurs'' on Discovery. Holtz is also the director of the Science and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Los Angeles
Los Angeles, often referred to by its initials L.A., is the List of municipalities in California, most populous city in the U.S. state of California, and the commercial, Financial District, Los Angeles, financial, and Culture of Los Angeles, cultural center of Southern California. With an estimated 3,878,704 residents within the city limits , it is the List of United States cities by population, second-most populous in the United States, behind only New York City. Los Angeles has an Ethnic groups in Los Angeles, ethnically and culturally diverse population, and is the principal city of a Metropolitan statistical areas, metropolitan area of 12.9 million people (2024). Greater Los Angeles, a combined statistical area that includes the Los Angeles and Riverside–San Bernardino metropolitan areas, is a sprawling metropolis of over 18.5 million residents. The majority of the city proper lies in Los Angeles Basin, a basin in Southern California adjacent to the Pacific Ocean in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discovery Channel
Discovery Channel, known as The Discovery Channel from 1985 to 1995, and often referred to as simply Discovery, is an American cable channel that is best known for its ongoing reality television shows and promotion of pseudoscience. It initially provided documentary television programming focused primarily on popular science, technology, and history, but by the 2010s had become increasingly dominated by programs that were reality television shows, promoted conspiracy theories, or advocated junk science. It is owned by Warner Bros. Discovery, a publicly traded company run by CEO David Zaslav. , Discovery Channel was the third most widely distributed subscription channel in the United States, behind now-sibling channel TBS and the Weather Channel; it is available in 409 million households worldwide, through its U.S. flagship channel and its various owned or licensed television channels internationally. , Discovery Channel is available to approximately 71,000,000 pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ornithomimosaurs
Ornithomimosauria ("bird-mimic lizards") are theropod dinosaurs which bore a superficial resemblance to the modern-day ostrich. They were fast, omnivorous or herbivorous dinosaurs from the Cretaceous Period (geology), Period of Laurasia (now Asia, Europe and North America), as well as possibly Africa. The group first appeared in the Early Cretaceous and persisted until the Late Cretaceous. Primitive members of the group include ''Nqwebasaurus'', ''Pelecanimimus'', ''Shenzhousaurus'', ''Hexing'' and ''Deinocheirus'', the arms of which reached 2.4 m (8 feet) in length. More advanced species, members of the family Ornithomimidae, include ''Gallimimus'', ''Struthiomimus'', and ''Ornithomimus''. Some paleontologists, like Paul Sereno, consider the enigmatic Alvarezsauridae, alvarezsaurids to be close relatives of the ornithomimosaurs and place them together in the superfamily Ornithomimoidea (see classification below). Description The skulls of ornithomimosaurs were small, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tyrannosauroidea
Tyrannosauroidea (meaning 'tyrant lizard forms') is a superfamily (or clade) of coelurosaurian theropod dinosaurs that includes the family Tyrannosauridae as well as more basal relatives. Tyrannosauroids lived on the Laurasian supercontinent beginning in the Jurassic Period. By the end of the Cretaceous Period, tyrannosauroids were the dominant large predators in the Northern Hemisphere, culminating in the gigantic ''Tyrannosaurus''. Fossils of tyrannosauroids have been recovered on what are now the continents of North America, Europe and Asia. If Megaraptora is part of Tyrannosauroidea, this would extend the distribution of the group to Australia and South America, and possible fragmentary remains of tyrannosauroids have also been reported from these continents. Tyrannosauroids were bipedal carnivores, as were most theropods, and were characterized by numerous skeletal features, especially of the skull and pelvis. Early in their existence, tyrannosauroids were small predat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arctometatarsalia
Ornithomimosauria ("bird-mimic lizards") are theropod dinosaurs which bore a superficial resemblance to the modern-day ostrich. They were fast, omnivorous or herbivorous dinosaurs from the Cretaceous Period of Laurasia (now Asia, Europe and North America), as well as possibly Africa. The group first appeared in the Early Cretaceous and persisted until the Late Cretaceous. Primitive members of the group include ''Nqwebasaurus'', ''Pelecanimimus'', '' Shenzhousaurus'', '' Hexing'' and ''Deinocheirus'', the arms of which reached 2.4 m (8 feet) in length. More advanced species, members of the family Ornithomimidae, include ''Gallimimus'', ''Struthiomimus'', and ''Ornithomimus''. Some paleontologists, like Paul Sereno, consider the enigmatic alvarezsaurids to be close relatives of the ornithomimosaurs and place them together in the superfamily Ornithomimoidea (see classification below). Description The skulls of ornithomimosaurs were small, with large eyes, above relatively ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arctometatarsus
An arctometatarsalian organism is one in which the proximal part of the middle metatarsal is pinched between the surrounding metatarsals. The trait appears to be highly homoplastic, common in certain sorts of dinosaurs accustomed to running (among them the tyrannosauroids, ornithomimosaurs, and troodontids Troodontidae is a clade of bird-like theropod dinosaurs from the Late Jurassic to Late Cretaceous. During most of the 20th century, troodontid fossils were few and incomplete and they have therefore been allied, at various times, with many dinos ...), to evenly transmit force to the metatarsals.Snively, E. (2000)''Functional morphology of the tyrannosaurid arctometatarsus''. University of Calgary. References Evolutionary biology concepts Vertebrate anatomy Skeletal system Dinosaur anatomy {{dinosaur-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maniraptoriformes
Coelurosauria (; from Greek, meaning "hollow-tailed lizards") is the clade containing all theropod dinosaurs more closely related to birds than to carnosaurs. Coelurosauria is a subgroup of theropod dinosaurs that includes compsognathids, tyrannosauroids, ornithomimosaurs, maniraptorans, and over the recent years, megaraptorans (Although position within the clade is unclear). Maniraptora includes birds, the only known dinosaur group alive today. In the past, Coelurosauria was used to refer to all small theropods, but this classification has since been amended. Most feathered dinosaurs discovered so far have been coelurosaurs. Philip J. Currie had considered it likely and probable that all coelurosaurs were feathered. However, several skin impressions found for some members of this group show pebbly, scaly skin, indicating that feathers did not completely replace scales in all taxa. Anatomy Bodyplan The studying of anatomical traits in coelurosaurs indicates that the last c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Ostrom
John Harold Ostrom (February 18, 1928 – July 16, 2005) was an American paleontologist who revolutionized the modern understanding of dinosaurs. Ostrom's work inspired what his pupil Robert T. Bakker has termed a " dinosaur renaissance". Beginning with the discovery of ''Deinonychus'' in 1964, Ostrom challenged the widespread belief that dinosaurs were slow-moving lizards (or "saurians"). He argued that ''Deinonychus'', a small two-legged carnivore, would have been fast-moving and warm-blooded. Further, Ostrom's work made zoologists question whether birds should be considered an order of Reptilia instead of their own class, Aves. The idea that dinosaurs were similar to birds was first proposed by Thomas Henry Huxley in the 1860s, but was dismissed by Gerhard Heilmann in his influential book '' The Origin of Birds'' (1926). Prior to Ostrom's work, the development of birds was generally believed to have split off early on from that of dinosaurs. Ostrom showed more bird-like tr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
College Park Scholars
The University of Maryland, College Park (University of Maryland, UMD, or simply Maryland) is a public land-grant research university in College Park, Maryland, United States. Founded in 1856, UMD is the flagship institution of the University System of Maryland. It is known as the biggest university in the state of Maryland. UMD is the largest university in Maryland and the Washington metropolitan area. Its eleven schools and colleges offer over 200 degree-granting programs, including 113 undergraduate majors, 107 master's programs, and 83 doctoral programs. UMD's athletic teams are known as the Maryland Terrapins and compete in NCAA Division I as a member of the Big Ten Conference. A member of the Association of American Universities, The University of Maryland's proximity to Washington, D.C. has resulted in many research partnerships with the federal government; faculty receive research funding and institutional support from many agencies, such as the National Institutes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clash Of The Dinosaurs
''Clash of the Dinosaurs'' is a four-part television mini-series produced by Dangerous LTD for Discovery Channel. The show premiered on December 6, 2009, with the first two episodes scheduled back-to-back. ''Clash of the Dinosaurs'' was negatively received, with critics citing leaps of logic and repetitive reenactments. The series also became the target of controversy when it emerged that a paleontologist interviewed onscreen had been quote mining, quote-mined; the dispute was resolved by reediting the offending scene. Featured genera * ''Sauroposeidon'' (model reused for ''Alamosaurus'', ''Last Day of the Dinosaurs'' only) * ''Ankylosaurus'' * ''Parasaurolophus'' (model reused for ''Charonosaurus'', ''Last Day of the Dinosaurs'' only) * ''Deinonychus'' (model reused for ''Saurornithoides'', ''Last Day of the Dinosaurs'' only) * ''Quetzalcoatlus'' (a non-dinosaur pterosaur) * ''Triceratops'' * ''Tyrannosaurus'' Episodes Release The show premiered on December 6, 2009, with "Ext ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinosaur Revolution
''Dinosaur Revolution'' is a four-part American nature documentary produced by Creative Differences. It utilizes computer-generated imagery to portray dinosaurs and other animals from the Mesozoic era. The program was originally aired on the Discovery Channel and Science. Although ''Dinosaur Revolution'' was the first dinosaur documentary to feature a darker, edgier, more serious and violent adult atmospheric tone and the first to have been targeted towards a 13 and 14 year old audience, it served as a reimagining of the comic book series Age of Reptiles. Background and production history Production of the series began in spring of 2009 (after several months of pre-production) and took three years in total. The series was built around several short- and long-form stories taking place in a number of distinct environments spanning the Mesozoic era. its Original title was''Reign of the Dinosaurs''.Holtz, Thomas R. Jr. (September 8, 2011)Commento"Coming soon to your screens: Dinosau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monsters Resurrected
''Monsters Resurrected'' is an American edutainment television series that premiered on September 13, 2009, on the Discovery Channel. The program reconstructs extinct animals of both Mesozoic and Cenozoic. It is also called ''Mega Beasts''. Episodes Home media The complete 2-disc DVD was released on May 4, 2010 via Amazon. This release did not include Episode 5 (discussing ''Amphicyon''). Reception In a mixed review, Riley Black wrote in the magazine '' Smithsonian'', "In the end, ''Monsters Resurrected'' left me feeling very conflicted. It was wonderful to see scientists describing real fossil evidence and the minutiae of paleontology—in the wake of ''Walking with Dinosaurs''-type shows, it's good to see scientists make a comeback. Nevertheless, the action sequences of the show make me wonder how much of the scientific content actually got through to viewers. What did they remember after watching the show—the details of ''Acrocanthosaurus'' anatomy, or a ''Spinosaurus'' r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
