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Dakota (fossil)
Dakota (specimen NDGS 2000) is the nickname given to an important ''Edmontosaurus'' fossil found in the Hell Creek Formation in North Dakota. It is about 67 million years old, placing it in the Maastrichtian, the last stage of the Cretaceous period. It was about 12 m (40 ft) long and weighed about 7-8 tons. The fossil is unusual and scientifically valuable because soft tissue including skin and muscle have been fossilized, giving researchers the rare opportunity to study more than bones, as with most vertebrate fossils. Some structures "retains soft-tissue replacement structures and associated organic compoundsPreliminary research results indicate that hadrosaurs had heavier tails and were able to run faster than was previously thought. Discovery and analysis Dakota was first discovered by paleontology student Tyler Lyson on his family's North Dakota property in 1999 while he was a high school student, but he did not investigate the site in detail until 2004, wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edmontosaurus NDGS 2000 Soft Tissue Diagram
''Edmontosaurus'' ( ) (meaning "lizard from Edmonton"), with the second species often colloquially and historically known as ''Anatosaurus'' or ''Anatotitan'' (meaning "duck lizard" and "giant duck"), is a genus of hadrosaurid (duck-billed) dinosaur. It contains two known species: '' Edmontosaurus regalis'' and ''Edmontosaurus annectens''. Fossils of ''E. regalis'' have been found in rocks of western North America that date from the late Campanian age of the Cretaceous period 73 million years ago, while those of ''E. annectens'' were found in the same geographic region from rocks dated to the end of the Maastrichtian age, 66 million years ago. ''Edmontosaurus'' was one of the last non- avian dinosaurs ever to exist, and lived alongside dinosaurs like ''Triceratops'', ''Tyrannosaurus'', '' Ankylosaurus'', and '' Pachycephalosaurus'' shortly before the Cretaceous–Paleogene extinction event. ''Edmontosaurus'' included two of the largest hadrosaurid species, with ''E. annec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CT Scan
A computed tomography scan (CT scan), formerly called computed axial tomography scan (CAT scan), is a medical imaging technique used to obtain detailed internal images of the body. The personnel that perform CT scans are called radiographers or radiology technologists. CT scanners use a rotating X-ray tube and a row of detectors placed in a gantry (medical), gantry to measure X-ray Attenuation#Radiography, attenuations by different tissues inside the body. The multiple X-ray measurements taken from different angles are then processed on a computer using tomographic reconstruction algorithms to produce Tomography, tomographic (cross-sectional) images (virtual "slices") of a body. CT scans can be used in patients with metallic implants or pacemakers, for whom magnetic resonance imaging (MRI) is Contraindication, contraindicated. Since its development in the 1970s, CT scanning has proven to be a versatile imaging technique. While CT is most prominently used in medical diagnosis, i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edmontosaurus NDGS 2000 Preservation
''Edmontosaurus'' ( ) (meaning "lizard from Edmonton"), with the second species often colloquially and historically known as ''Anatosaurus'' or ''Anatotitan'' (meaning "duck lizard" and "giant duck"), is a genus of hadrosaurid (duck-billed) dinosaur. It contains two known species: '' Edmontosaurus regalis'' and ''Edmontosaurus annectens''. Fossils of ''E. regalis'' have been found in rocks of western North America that date from the late Campanian age of the Cretaceous period 73 million years ago, while those of ''E. annectens'' were found in the same geographic region from rocks dated to the end of the Maastrichtian age, 66 million years ago. ''Edmontosaurus'' was one of the last non- avian dinosaurs ever to exist, and lived alongside dinosaurs like ''Triceratops'', ''Tyrannosaurus'', '' Ankylosaurus'', and '' Pachycephalosaurus'' shortly before the Cretaceous–Paleogene extinction event. ''Edmontosaurus'' included two of the largest hadrosaurid species, with ''E. annec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State Of North Dakota
North Dakota ( ) is a U.S. state in the Upper Midwest, named after the indigenous Dakota and Sioux peoples. It is bordered by the Canadian provinces of Saskatchewan and Manitoba to the north and by the U.S. states of Minnesota to the east, South Dakota to the south, and Montana to the west. North Dakota is part of the Great Plains region, characterized by broad prairies, steppe, temperate savanna, badlands, and farmland. North Dakota is the 19th-largest state by area, but with a population of just under 800,000, the fourth-least populous and fourth-least densely populated. The state capital is Bismarck and the most populous city is Fargo, which accounts for nearly a fifth of the state's population; both cities are among the fastest-growing in the U.S., although half of North Dakotans live in rural areas. What is now North Dakota was inhabited for thousands of years by various Native American tribes, including the Mandan, Hidatsa, and Arikara along the Missouri Rive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Dakota Heritage Center
The North Dakota Heritage Center & State Museum, located on the North Dakota State Capitol grounds in Bismarck, is the state of North Dakota's official history museum. The original building, which was opened in 1981, is operated by the State Historical Society of North Dakota and features permanent and temporary exhibits. In June 2008, the museum, which has been called a "Smithsonian on the plains", became home to a rare mummified Edmontosaurus ''Edmontosaurus'' ( ) (meaning "lizard from Edmonton"), with the second species often colloquially and historically known as ''Anatosaurus'' or ''Anatotitan'' (meaning "duck lizard" and "giant duck"), is a genus of hadrosaurid (duck-billed) din ... with fossilized skin. Expansion of the North Dakota Heritage Center & State Museum finished with a grand opening on November 2, 2014, coinciding with the 125th anniversary of statehood. The expansion added 127,000 square feet of collections storage, labs, and office space, doubling the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marmarth Research Foundation
Marmarth ( ) is the largest city in Slope County in the U.S. State of North Dakota with a population of 101 as of 2020 census. It is situated in the southwestern part of Slope County, along the Bowman County line in the southwestern part of North Dakota, just seven miles east of the Montana border. Marmarth was founded as a railroad town along the Milwaukee Road from Seattle, WA to Chicago, IL. By 1920, Marmarth had over 1,300 residents. The town's population declined during most of the 20th century and was only 101 in 2021. There is one restaurant and one bar still located in Marmarth in 2013. The town is recognized for various historical events, including Native-American Lakota history, the discovery of the Dakota fossil and various other dinosaur skeletons, the attack on James L. Fisk by Sitting Bull, and several visits by former president Theodore Roosevelt. Roosevelt visited Marmarth on several occasions and killed both his first buffalo and his first grizzly bear by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Geographic (American TV Channel)
National Geographic (formerly National Geographic Channel; abbreviated and trademarked as Nat Geo or Nat Geo TV) is an American pay television network and flagship channel owned by the National Geographic Global Networks unit of Disney Entertainment and National Geographic Partners, a joint venture between the Walt Disney Company (73%) and the National Geographic Society (27%), with the operational management handled by Disney Entertainment. The flagship channel airs non-fiction television programs produced by National Geographic and other production companies. Like History (which is 50% owned by Disney through A&E Networks) and Discovery Channel, the channel features documentaries with factual content involving nature, science, culture, and history, plus some reality and pseudo-scientific entertainment programming. Its primary sister network worldwide, including the United States, is Nat Geo Wild, which focuses on animal-related programs. , Nat Geo is available to app ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scale (anatomy)
In zoology, a scale (; ) is a small rigid plate (animal anatomy), plate made out of keratin that grows out of Vertebrate animals' skin to provide protection. In lepidopterans (butterflies and moths), scales are plates on the surface of the insect wing, made out of chitin instead of keratin, and provide coloration. Scales are quite common and have evolved multiple times through convergent evolution, with varying structure and function. Scales are generally classified as part of an organism's integumentary system. There are various types of scales according to the shape and class (biology), class of an animal. Fish scales Fish scales are skin, dermally derived, specifically in the mesoderm. This fact distinguishes them from reptile scales paleontologically. Genetically, the same genes involved in tooth and hair development in mammals are also involved in scale development. File:Ganoid scales.png, Ganoid scales on a carboniferous fish ''Amblypterus striatus'' File:Denticules cutan� ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Integument
In biology, an integument is the tissue surrounding an organism's body or an organ within, such as skin, a husk, Exoskeleton, shell, germ or Peel (fruit), rind. Etymology The term is derived from ''integumentum'', which is Latin for "a covering". In a transferred, or figurative sense, it could mean a cloak or a disguise. In English, "integument" is a fairly modern word, its origin having been traced back to the early seventeenth century; and refers to a material or layer with which anything is enclosed, clothed, or covered in the sense of "clad" or "coated", as with a skin or husk. Botanical usage In botany, the term "integument" may be used as it is in zoology, referring to the covering of an organ. When the context indicates nothing to the contrary, the word commonly refers to an envelope covering the nucellus of the Ovule#Integuments, chivai and chalaza, ovule. The integument may consist of one layer (unitegmic) or two layers (bitegmic), each of which consisting of two or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tyrannosaurus
''Tyrannosaurus'' () is a genus of large theropod dinosaur. The type species ''Tyrannosaurus rex'' ( meaning 'king' in Latin), often shortened to ''T. rex'' or colloquially t-rex, is one of the best represented theropods. It lived throughout what is now western North America, on what was then an island continent known as Laramidia. ''Tyrannosaurus'' had a much wider range than other tyrannosaurids. Fossils are found in a variety of geological formations dating to the latest Campanian-Maastrichtian ages of the late Cretaceous period, 72.7 to 66 million years ago, with isolated specimens possibly indicating an earlier origin in the middle Campanian. It was the last known member of the tyrannosaurids and among the last non- avian dinosaurs to exist before the Cretaceous–Paleogene extinction event. Like other tyrannosaurids, ''Tyrannosaurus'' was a bipedal carnivore with a massive skull balanced by a long, heavy tail. Relative to its large and powerful hind limbs, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mass
Mass is an Intrinsic and extrinsic properties, intrinsic property of a physical body, body. It was traditionally believed to be related to the physical quantity, quantity of matter in a body, until the discovery of the atom and particle physics. It was found that different atoms and different elementary particle, elementary particles, theoretically with the same amount of matter, have nonetheless different masses. Mass in modern physics has multiple Mass in special relativity, definitions which are conceptually distinct, but physically equivalent. Mass can be experimentally defined as a measure (mathematics), measure of the body's inertia, meaning the resistance to acceleration (change of velocity) when a net force is applied. The object's mass also determines the Force, strength of its gravitational attraction to other bodies. The SI base unit of mass is the kilogram (kg). In physics, mass is Mass versus weight, not the same as weight, even though mass is often determined by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tendon
A tendon or sinew is a tough band of fibrous connective tissue, dense fibrous connective tissue that connects skeletal muscle, muscle to bone. It sends the mechanical forces of muscle contraction to the skeletal system, while withstanding tension (physics), tension. Tendons, like ligaments, are made of collagen. The difference is that ligaments connect bone to bone, while tendons connect muscle to bone. There are about 4,000 tendons in the adult human body. Structure A tendon is made of dense regular connective tissue, whose main cellular components are special fibroblasts called tendon cells (tenocytes). Tendon cells synthesize the tendon's extracellular matrix, which abounds with densely-packed collagen fibers. The collagen fibers run parallel to each other and are grouped into fascicles. Each fascicle is bound by an endotendineum, which is a delicate loose connective tissue containing thin collagen fibrils and elastic fibers. A set of fascicles is bound by an epitenon, whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
