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Dinosaur Wars Program Transcript
Page 1 Dinosaur Wars Program Transcript Narrator: For more than a century, Americans have had a love affair with dinosaurs. Extinct for millions of years, they were barely known until giant, fossil bones were discovered in the mid-nineteenth century. Two American scientists, Edward Drinker Cope and Othniel Charles Marsh, led the way to many of these discoveries, at the forefront of the young field of paleontology. Jacques Gauthier, Paleontologist: Every iconic dinosaur every kid grows up with, apatosaurus, triceratops, stegosaurus, allosaurus, these guys went out into the American West and they found that stuff. Narrator: Cope and Marsh shed light on the deep past in a way no one had ever been able to do before. They unearthed more than 130 dinosaur species and some of the first fossil evidence supporting Darwin’s new theory of evolution. Mark Jaffe, Writer: Unfortunately there was a more sordid element, too, which was their insatiable hatred for each other, which often just baffled and exasperated everyone around them. Peter Dodson, Paleontologist: They began life as friends. Then things unraveled… and unraveled in quite a spectacular way. Narrator: Cope and Marsh locked horns for decades, in one of the most bitter scientific rivalries in American history. Constantly vying for leadership in their young field, they competed ruthlessly to secure gigantic bones in the American West. They put American science on the world stage and nearly destroyed one another in the process. Page 2 In the summer of 1868, a small group of scientists boarded a Union Pacific train for a sightseeing excursion through the heart of the newly-opened American West. -
The World at the Time of Messel: Conference Volume
T. Lehmann & S.F.K. Schaal (eds) The World at the Time of Messel - Conference Volume Time at the The World The World at the Time of Messel: Puzzles in Palaeobiology, Palaeoenvironment and the History of Early Primates 22nd International Senckenberg Conference 2011 Frankfurt am Main, 15th - 19th November 2011 ISBN 978-3-929907-86-5 Conference Volume SENCKENBERG Gesellschaft für Naturforschung THOMAS LEHMANN & STEPHAN F.K. SCHAAL (eds) The World at the Time of Messel: Puzzles in Palaeobiology, Palaeoenvironment, and the History of Early Primates 22nd International Senckenberg Conference Frankfurt am Main, 15th – 19th November 2011 Conference Volume Senckenberg Gesellschaft für Naturforschung IMPRINT The World at the Time of Messel: Puzzles in Palaeobiology, Palaeoenvironment, and the History of Early Primates 22nd International Senckenberg Conference 15th – 19th November 2011, Frankfurt am Main, Germany Conference Volume Publisher PROF. DR. DR. H.C. VOLKER MOSBRUGGER Senckenberg Gesellschaft für Naturforschung Senckenberganlage 25, 60325 Frankfurt am Main, Germany Editors DR. THOMAS LEHMANN & DR. STEPHAN F.K. SCHAAL Senckenberg Research Institute and Natural History Museum Frankfurt Senckenberganlage 25, 60325 Frankfurt am Main, Germany [email protected]; [email protected] Language editors JOSEPH E.B. HOGAN & DR. KRISTER T. SMITH Layout JULIANE EBERHARDT & ANIKA VOGEL Cover Illustration EVELINE JUNQUEIRA Print Rhein-Main-Geschäftsdrucke, Hofheim-Wallau, Germany Citation LEHMANN, T. & SCHAAL, S.F.K. (eds) (2011). The World at the Time of Messel: Puzzles in Palaeobiology, Palaeoenvironment, and the History of Early Primates. 22nd International Senckenberg Conference. 15th – 19th November 2011, Frankfurt am Main. Conference Volume. Senckenberg Gesellschaft für Naturforschung, Frankfurt am Main. pp. 203. -
Mammalia, Notoungulata), from the Eocene of Patagonia, Argentina
Palaeontologia Electronica palaeo-electronica.org An exceptionally well-preserved skeleton of Thomashuxleya externa (Mammalia, Notoungulata), from the Eocene of Patagonia, Argentina Juan D. Carrillo and Robert J. Asher ABSTRACT We describe one of the oldest notoungulate skeletons with associated cranioden- tal and postcranial elements: Thomashuxleya externa (Isotemnidae) from Cañadón Vaca in Patagonia, Argentina (Vacan subage of the Casamayoran SALMA, middle Eocene). We provide body mass estimates given by different elements of the skeleton, describe the bone histology, and study its phylogenetic position. We note differences in the scapulae, humerii, ulnae, and radii of the new specimen in comparison with other specimens previously referred to this taxon. We estimate a body mass of 84 ± 24.2 kg, showing that notoungulates had acquired a large body mass by the middle Eocene. Bone histology shows that the new specimen was skeletally mature. The new material supports the placement of Thomashuxleya as an early, divergent member of Toxodon- tia. Among placentals, our phylogenetic analysis of a combined DNA, collagen, and morphology matrix favor only a limited number of possible phylogenetic relationships, but cannot yet arbitrate between potential affinities with Afrotheria or Laurasiatheria. With no constraint, maximum parsimony supports Thomashuxleya and Carodnia with Afrotheria. With Notoungulata and Litopterna constrained as monophyletic (including Macrauchenia and Toxodon known for collagens), these clades are reconstructed on the stem -
Quaternary International Colonisation and Early Peopling of The
Quaternary International xxx (xxxx) xxx–xxx Contents lists available at ScienceDirect Quaternary International journal homepage: www.elsevier.com/locate/quaint Colonisation and early peopling of the Colombian Amazon during the Late Pleistocene and the Early Holocene: New evidence from La Serranía La Lindosa ∗ Gaspar Morcote-Ríosa, Francisco Javier Aceitunob, , José Iriartec, Mark Robinsonc, Jeison L. Chaparro-Cárdenasa a Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá, Colombia b Departamento de Antropología, Universidad de Antioquia, Medellín, Colombia c Department of Archaeology, Exeter, University of Exeter, United Kingdom ARTICLE INFO ABSTRACT Keywords: Recent research carried out in the Serranía La Lindosa (Department of Guaviare) provides archaeological evi- Colombian amazon dence of the colonisation of the northwest Colombian Amazon during the Late Pleistocene. Preliminary ex- Serranía La Lindosa cavations were conducted at Cerro Azul, Limoncillos and Cerro Montoya archaeological sites in Guaviare Early peopling Department, Colombia. Contemporary dates at the three separate rock shelters establish initial colonisation of Foragers the region between ~12,600 and ~11,800 cal BP. The contexts also yielded thousands of remains of fauna, flora, Human adaptability lithic artefacts and mineral pigments, associated with extensive and spectacular rock pictographs that adorn the Rock art rock shelter walls. This article presents the first data from the region, dating the timing of colonisation, de- scribing subsistence strategies, and examines human adaptation to these transitioning landscapes. The results increase our understanding of the global expansion of human populations, enabling assessment of key inter- actions between people and the environment that appear to have lasting repercussions for one of the most important and biologically diverse ecosystems in the world. -
Variable Impact of Late-Quaternary Megafaunal Extinction in Causing
Variable impact of late-Quaternary megafaunal SPECIAL FEATURE extinction in causing ecological state shifts in North and South America Anthony D. Barnoskya,b,c,1, Emily L. Lindseya,b, Natalia A. Villavicencioa,b, Enrique Bostelmannd,2, Elizabeth A. Hadlye, James Wanketf, and Charles R. Marshalla,b aDepartment of Integrative Biology, University of California, Berkeley, CA 94720; bMuseum of Paleontology, University of California, Berkeley, CA 94720; cMuseum of Vertebrate Zoology, University of California, Berkeley, CA 94720; dRed Paleontológica U-Chile, Laboratoria de Ontogenia, Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Chile; eDepartment of Biology, Stanford University, Stanford, CA 94305; and fDepartment of Geography, California State University, Sacramento, CA 95819 Edited by John W. Terborgh, Duke University, Durham, NC, and approved August 5, 2015 (received for review March 16, 2015) Loss of megafauna, an aspect of defaunation, can precipitate many megafauna loss, and if so, what does this loss imply for the future ecological changes over short time scales. We examine whether of ecosystems at risk for losing their megafauna today? megafauna loss can also explain features of lasting ecological state shifts that occurred as the Pleistocene gave way to the Holocene. We Approach compare ecological impacts of late-Quaternary megafauna extinction The late-Quaternary impact of losing 70–80% of the megafauna in five American regions: southwestern Patagonia, the Pampas, genera in the Americas (19) would be expected to trigger biotic northeastern United States, northwestern United States, and Berin- transitions that would be recognizable in the fossil record in at gia. We find that major ecological state shifts were consistent with least two respects. -
Attachment J Assessment of Existing Paleontologic Data Along with Field Survey Results for the Jonah Field
Attachment J Assessment of Existing Paleontologic Data Along with Field Survey Results for the Jonah Field June 12, 2007 ABSTRACT This is compilation of a technical analysis of existing paleontological data and a limited, selective paleontological field survey of the geologic bedrock formations that will be impacted on Federal lands by construction associated with energy development in the Jonah Field, Sublette County, Wyoming. The field survey was done on approximately 20% of the field, primarily where good bedrock was exposed or where there were existing, debris piles from recent construction. Some potentially rich areas were inaccessible due to biological restrictions. Heavily vegetated areas were not examined. All locality data are compiled in the separate confidential appendix D. Uinta Paleontological Associates Inc. was contracted to do this work through EnCana Oil & Gas Inc. In addition BP and Ultra Resources are partners in this project as they also have holdings in the Jonah Field. For this project, we reviewed a variety of geologic maps for the area (approximately 47 sections); none of maps have a scale better than 1:100,000. The Wyoming 1:500,000 geology map (Love and Christiansen, 1985) reveals two Eocene geologic formations with four members mapped within or near the Jonah Field (Wasatch – Alkali Creek and Main Body; Green River – Laney and Wilkins Peak members). In addition, Winterfeld’s 1997 paleontology report for the proposed Jonah Field II Project was reviewed carefully. After considerable review of the literature and museum data, it became obvious that the portion of the mapped Alkali Creek Member in the Jonah Field is probably misinterpreted. -
EXTREME MAMMALS Amnh.Org/Extrememammals GRADES 3-5 ACTIVITIES
EXTREME MAMMALS amnh.org/extrememammals GRADES 3-5 ACTIVITIES Welcome to Extreme Mammals: The Biggest, Smallest, and Most Amazing Mammals of All Time. Use this sheet to help your class explore what makes a mammal a mammal, and discover what’s normal or extreme when it comes to this incredibly diverse group of animals. The activities below and on the Student Worksheet can be adapted to meet your students’ interests and abilities. BEFORE YOUR VISIT New York State Science Class Discussion: Mammals live everywhere from the sea to the treetops, Core Curriculum and have evolved to swim, glide, burrow, run, hop, climb trees, and even Major Understanding LE 3.1c fl y. Start a discussion by asking students what they think is “normal” for In order to survive in their a mammal when it comes to size, shape, or behavior. What’s “extreme” environment, plants and animals or unusual, and why? For information to support the discussion, refer to must adapt to that environment. the Essential Questions section of the Guide. Research Activity: After your discussion, have students go on a Web Hunt: Dioramas Coming to Life (www2.scholastic.com/ browse/article.jsp?id=11422). Ask students to fi nd examples of mammals on their hunt that will help them fi nd answers to these questions: What is a mammal? What’s “normal” for mammals? and How and why are some mammals “extreme”? DURING YOUR VISIT IN THE EXTREME MAMMALS EXHIBITION Students can use the reproducible on the Use the activities and guiding questions in Sections 1 and 2 reverse side of this sheet to further explore these of Teaching in the Exhibition in this Guide to help students concepts. -
Convergent Evolution
Exploring the KU Natural History Museum Convergent Evolution Target Audience: Middle school and above Differentiated Instruction Summary Strategy Levels Content/Process/Product Grouping(s) Learning modalities Whole group • Level 1 – Visual (spatial) Small groups Process Cubing Level 2 – Kinesthetic (physical) Peer partners • Product • Level 3 – Verbal (linguistic) Homogeneous Heterogeneous * Varied grouping options can be used for this activity, depending on student needs and chaperone ability. Objectives: Explore examples of convergent evolution in vertebrates. Pre-assessment/Prior Knowledge: Prior to their visit, students should be familiar with the idea of convergent evolution, overall evolutionary relationships/classification of vertebrate groups and basic anatomy of those groups. Activity Description: Students explore the idea of convergent evolution through museum exhibits through different learning modalities. Materials Needed: • Student o Cubes (three levels, see attached) o Paper and pencils (alternatively you could use flipchart paper and markers, whiteboards and dry erase markers) o Optional (cell phones or other recording device for visual or kinesthetic levels) Note: Format to record/present findings determined by individual teacher. Provide clear instructions about expectations for documenting participation, particularly for verbal/spatial and body/kinesthetic levels (e.g. stage direction, audio/video recording). • Teacher o Content Outline o Cube labels o Cube template Content: Convergence Overview Convergent evolution refers to the similarities in biological traits that arise independently in organisms that are not closely related, e.g. wings in birds, bats and insects. Similarity among organisms and their structures that was not inherited from a common ancestor is considered to be homoplasy. This can be contrasted with homology, which refers to similarity of traits due to common ancestry. -
8. Primate Evolution
8. Primate Evolution Jonathan M. G. Perry, Ph.D., The Johns Hopkins University School of Medicine Stephanie L. Canington, B.A., The Johns Hopkins University School of Medicine Learning Objectives • Understand the major trends in primate evolution from the origin of primates to the origin of our own species • Learn about primate adaptations and how they characterize major primate groups • Discuss the kinds of evidence that anthropologists use to find out how extinct primates are related to each other and to living primates • Recognize how the changing geography and climate of Earth have influenced where and when primates have thrived or gone extinct The first fifty million years of primate evolution was a series of adaptive radiations leading to the diversification of the earliest lemurs, monkeys, and apes. The primate story begins in the canopy and understory of conifer-dominated forests, with our small, furtive ancestors subsisting at night, beneath the notice of day-active dinosaurs. From the archaic plesiadapiforms (archaic primates) to the earliest groups of true primates (euprimates), the origin of our own order is characterized by the struggle for new food sources and microhabitats in the arboreal setting. Climate change forced major extinctions as the northern continents became increasingly dry, cold, and seasonal and as tropical rainforests gave way to deciduous forests, woodlands, and eventually grasslands. Lemurs, lorises, and tarsiers—once diverse groups containing many species—became rare, except for lemurs in Madagascar where there were no anthropoid competitors and perhaps few predators. Meanwhile, anthropoids (monkeys and apes) emerged in the Old World, then dispersed across parts of the northern hemisphere, Africa, and ultimately South America. -
The Genetic Causes of Convergent Evolution
Nature Reviews Genetics | AOP, published online 9 October 2013; doi:10.1038/nrg3483 REVIEWS The genetic causes of convergent evolution David L. Stern Abstract | The evolution of phenotypic similarities between species, known as convergence, illustrates that populations can respond predictably to ecological challenges. Convergence often results from similar genetic changes, which can emerge in two ways: the evolution of similar or identical mutations in independent lineages, which is termed parallel evolution; and the evolution in independent lineages of alleles that are shared among populations, which I call collateral genetic evolution. Evidence for parallel and collateral evolution has been found in many taxa, and an emerging hypothesis is that they result from the fact that mutations in some genetic targets minimize pleiotropic effects while simultaneously maximizing adaptation. If this proves correct, then the molecular changes underlying adaptation might be more predictable than has been appreciated previously. (FIG. 1) Fitness Different species often evolve similar solutions to envi introgression . It is worth distinguishing between The potential evolutionary ronmental challenges. Insects, birds and bats evo these scenarios because each provides evidence for a dif success of a genotype, defined lved wings, and octopi, vertebrates and spiders ferent evolutionary path3. The first case, the independent as the reproductive success or evolved focusing eyes. Phenotypic convergence provides origin and spread of mutations, has been called parallel the proportion of genes that an individual leaves in the gene compelling evidence that ecological circumstances can genetic evolution. I suggest that the evolution of alleles 1,2 pool of the next generation in a select for similar evolutionary solutions . -
Prospects for Rewilding with Camelids
Journal of Arid Environments 130 (2016) 54e61 Contents lists available at ScienceDirect Journal of Arid Environments journal homepage: www.elsevier.com/locate/jaridenv Prospects for rewilding with camelids Meredith Root-Bernstein a, b, *, Jens-Christian Svenning a a Section for Ecoinformatics & Biodiversity, Department of Bioscience, Aarhus University, Aarhus, Denmark b Institute for Ecology and Biodiversity, Santiago, Chile article info abstract Article history: The wild camelids wild Bactrian camel (Camelus ferus), guanaco (Lama guanicoe), and vicuna~ (Vicugna Received 12 August 2015 vicugna) as well as their domestic relatives llama (Lama glama), alpaca (Vicugna pacos), dromedary Received in revised form (Camelus dromedarius) and domestic Bactrian camel (Camelus bactrianus) may be good candidates for 20 November 2015 rewilding, either as proxy species for extinct camelids or other herbivores, or as reintroductions to their Accepted 23 March 2016 former ranges. Camels were among the first species recommended for Pleistocene rewilding. Camelids have been abundant and widely distributed since the mid-Cenozoic and were among the first species recommended for Pleistocene rewilding. They show a range of adaptations to dry and marginal habitats, keywords: Camelids and have been found in deserts, grasslands and savannas throughout paleohistory. Camelids have also Camel developed close relationships with pastoralist and farming cultures wherever they occur. We review the Guanaco evolutionary and paleoecological history of extinct and extant camelids, and then discuss their potential Llama ecological roles within rewilding projects for deserts, grasslands and savannas. The functional ecosystem Rewilding ecology of camelids has not been well researched, and we highlight functions that camelids are likely to Vicuna~ have, but which require further study. -
SARS-Cov-2 Convergent Evolution As a Guide to Explore Adaptive Advantage
bioRxiv preprint doi: https://doi.org/10.1101/2021.05.24.445534; this version posted May 25, 2021. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. SARS-CoV-2 convergent evolution as a guide to explore adaptive advantage Jiří Zahradník1, Jaroslav Nunvar2,3, and Gideon Schreiber1* 1 Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot 7610001, Israel 2 Department of Genetics and Microbiology, Faculty of Science, Charles University, Prague 12844, Czech Republic 3 BIOCEV - Biotechnology and Biomedicine Centre of the Academy of Sciences and Charles University, Vestec 25250, Czech Republic * Corresponding author email: [email protected] Author Contributions: Author contributions: J.Z. and G.S. conceived the project; J.Z., J.N. and G.S. performed experiments; J.Z., J.N. and G.S. wrote the manuscript. Competing Interest Statement: Authors declare no competing interests. Keywords: SARS-CoV-2, Convergent Evolution, Mutations bioRxiv preprint doi: https://doi.org/10.1101/2021.05.24.445534; this version posted May 25, 2021. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. Abstract Much can be learned from 1.2 million sequences of SARS-CoV-2 generated during the last 15 months. Out of the overwhelming number of mutations sampled so far, only few rose to prominence in the viral population. Many of these emerged recently and independently in multiple lineages. Such a textbook example of convergent evolution at the molecular level is not only curiosity but a guide to uncover the basis for adaptive advantage behind these events.