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1/11/2019A rather humorous experiment involving "ten gigantic crocodiles" was described in an article in Scientific American published February 25 th 1882 The aim of the experiment was to calculate the strength of the muscles of the crocodile's jaw which they determined as 1540 lb although noted that "this experiment was performed on a
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The human jaw‐closing and jaw‐opening muscles produce forces leading to the development of three‐dimensional bite and chewing forces and to three‐dimensional movements of the jaw The length of the sarcomeres is a major determinant for both force and velocity and the maximal work force and shortening range each muscle is capable of
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A phosphene is a phenomenon characterized by the experience of seeing light without light actually entering the eye In 1970 a scientist named Oster hypothesized in Scientific American that the prisoner's cinema may be the cause of some "ghost" sightings Others have noted a connection between the lights and Neolithic cave paintings
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Although these developments have improved our knowledge of the working of the human masticatory system the persistence of some outdated theories is striking A prominent example is related to the articulation ( Gysi 1910 ) where there is a need to find a simple reliable method for describing jaw movements near dental occlusion in
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You may copy it give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at Title: Scientific American Supplement No 275 Author: Various Posting Date: October 10 2012 [EBook #8195] Release Date: May 2005 First Posted: June 30 2003 Language: English Character set
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The American alligator is one of just two species of true alligators - the other is the Chinese alligator Alligators are one animal that has changed very little since the prehistoric days When dinosaurs became extinct these modern day contemporaries continued to prosper
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The Editor of the Scientific American receives during the year thousands of inquiries from readers and correspondents covering a wide range of topics The information sought for in many cases can not readily be found in any available reference or text-book It has been decided therefore to prepare a work which shall be comprehensive in character and which shall contain a mass of
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Much of this has focused on formal organizational changes stripping Bora of power and titles and banning him from the conference These are entirely appropriate though partly moot given that he's resigned from both Scientific American and Science Online– a formal ban is the only remaining step Must be Tuesday
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Temporal changes in cerebral blood flow induced by jaw movement have yet to be investigated To assess the influence of pattern and intensity of muscle contraction during jaw movement on task-induced change in cerebral blood flow we performed bilateral transcranial Doppler ultrasound examination during clenching gum chewing and tooth tapping in healthy volunteers
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5/21/2016evolution of jaws and tmj contents introduction history evolution of jaws evolution of maxilla evolution of mandible evolution of tmj conclusion reference 2 INTRODUCTION1 2 6 Human masticatory system which consists of maxilla mandible teeth temporomandibular joint and the masticatory muscles is functionally involved in not only feeding
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Astronomy Biology Animal Behavior Archaeology Microbiology Spotlight Cancer Care Is Getting Better But Also More Expensive Hannah McGillivray Richard J Wassersug Cognition-Lite Studies of Human Belief Justin L Barrett Psychology Religion Review Scientists Nightstand Books Robert Frederick Biology Technology Anatomy Sightings
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90 SCIENTIFIC AMERICAN NOVEMBER 2004 Music has been ubiquitous in human societies throughout the world since the dawn of culture Appreciation for music appears to be innate infants as young as two months will turn toward pleasant sounds Many different regions of the brain respond to the perceptual and emotional aspects of music and the
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Introducing Human Body Version 2 0 We won't engineer human body version 2 0 all at once It will be an incremental process one already well under way Although version 2 0 is a grand project ultimately resulting in the radical upgrading of all our physical and mental systems we will
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The so-called jawline is the jaw area or the lower jaw contour of the human face It consists mainly of the jaw bone and the interaction of three muscles: temporalis masseter and pterygoideus medialis These muscle you can train like all other muscles in our body the jaw muscles grow when stimulated by targeted training
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re: Scientific American: NOLA screwed new levee system obsolete in 4 years Posted by BottomlandBrew on 4/12/19 at 3:11 pm to Cymry Teigr Funny story I may have told on here before We're going over some designs one day and a Dutch engineer asks what our annual rainfall is
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5/30/2018She is currently the only Diplomate of the American Board of Orthodontics that practices exclusively Biobloc Orthotropics In this episode authors of Jaws: The Story of a Hidden Epidemic Dr Sandra Khan and Dr Paul Ehrlich discuss the evolution of the human jaw throughout time and how today humans face a pressing epidemic of shrinking jaws
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A reprint from American Scientist the magazine of Sigma Xi The Scientific Research Society This reprint is provided for personal and noncommercial use For any other use please send a request to Permissions American Scientist P O Box 13975 Research Triangle Park NC 27709 U S A or by electronic mail to permsamsci
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Freedom Scientific offers a wide range of powerful desktop and portable video magnifiers designed for people with low vision conditions Our magnifiers are made to help with all types of daily activities Discover the freedom of independently reading and viewing the details that matter with any of our powerful low vision magnifiers
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The American black bear (Ursus americanus previously known as Euarctos americanus) is a medium-sized bear native to North America It is the continent's smallest and most widely distributed bear species American black bears are omnivores with their diets varying greatly depending on season and location They typically live in largely forested areas but do leave forests in search of food
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The American bullfrog (Lithobates catesbeianus) often simply known as the bullfrog in Canada and the United States is an amphibious frog a member of the family Ranidae or true frogs This frog has an olive green back and sides blotched with brownish markings and a whitish belly spotted with yellow or grey The upper lip is often bright green and males have yellow throats
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To explore the question of jaw strength a 2005 National Geographic study measured force of bite for several creatures as pounds of bite pressure On average dogs exhibited about 320 pounds of pressure while humans came in at 120 pounds and great white sharks at 600 The study also included a simulated bite sleeve test with a German shepherd
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Human fascination with the biting power of large spectacular predators — especially those known or supposed to have attacked human beings — dates back to antiquity Just about every fan of such predatory superstars has his or her favorite candidate for the title of World's Most Powerful Bite
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Jaw crushers are used for the rapid crushing of hard crusher - wikipedia - jaw crushing made simple a crusher is a machine designed to reduce large rocks into smaller rocks gravel or rock dust it was only after explosives and later early powerful steam shovels produced large chunks of mate the power of the human jaw - scientific
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Histochemical studies show that the distribution of fiber types in human jaw muscles is different from that in various limb muscles no doubt representing different functional demands as well as a different embryological derivation Jaw-closing muscles appear more resistant to fatigue than limb muscles with intermittent maximal contractions
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