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William Healey Dall

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William Healey Dall (August 21, 1845 – March 27, 1927) was an American naturalist, a prominent malacologist, and one of the earliest scientific explorers of interior Alaska. He described many mollusks of the Pacific Northwest of North America, and was for many years America's preeminent authority on living and fossil mollusks. Dall also made substantial contributions to ornithology, zoology, physical and cultural anthropology, oceanography, and paleontology.

United States Coast and Geodetic SurveyUnited States Coast and Geodetic SurveyFormer U.S. government scientific agencyThe United States Coast and Geodetic Survey (abbreviatedUSC&GS; known as the Survey of the Coast from 1807 to 1836, and as the United States Coast Survey from 1836 until 1878) was the first scientific agency of the United States government. It existed from 1807 to 1970, and throughout its history was responsible for mapping and charting the coast of the United States, and later the coasts of U.S. territories.MalacologyMalacologyMalacology, from Ancient Greek μαλακός (malakós), meaning "soft", and λόγος (lógos), meaning "study", is the branch of invertebrate zoology that deals with the study of the Mollusca (molluscs or mollusks), the second-largest phylum of animals in terms of described species after the arthropods. Mollusks include snails and slugs, clams, and cephalopods, along with numerous other kinds, many of which have shells.Smithsonian InstitutionSmithsonian InstitutionUS group of museums and research centersFlag of the Smithsonian InstitutionThe Smithsonian Institution ( ; or simply the Smithsonian) is a group of museums, education and research centers, created by the United States federal government "for the increase and diffusion of knowledge". Founded on August 10, 1846, it operates as a trust instrumentality and is not formally a part of any of the three branches of the federal government.Pacific NorthwestPacific NorthwestThe Pacific Northwest (PNW; French: Nord-Ouest Pacifique), also referred to as Cascadia, is a bi-national geographic and cultural region in Western North America defined by its coastal waters of the Pacific Ocean to the west and, loosely, by the Rocky Mountains to the east. Though no official boundary exists, the most common conception includes the U.S. states of Oregon, Washington, Idaho, and the Canadian province of British Columbia.ZoologyZoologyZoology ( zoh-OL-ə-jee, UK also zoo-) is the scientific study of animals. Its studies include the structure, embryology, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems. Zoology is one of the primary branches of biology. The term is derived from Ancient Greek ζῷον (zôion) 'animal' and λόγος (lógos) 'study of'.OceanographyOceanographyScientific study of the oceanThermohaline circulation.Oceanography (from Ancient Greek ὠκεανός (ōkeanós) 'ocean' and γραφή (graphḗ) 'writing'), also known as oceanology, sea science, ocean science, and marine science, is the scientific study of the ocean, including its physics, chemistry, biology, and geology.PaleontologyPaleontologyPaleontology or palaeontology is the scientific study of the life of the past, mainly but not exclusively through the study of fossils. Paleontologists use fossils as a means to classify organisms, measure geologic time, and assess the interactions between prehistoric organisms and their natural environment.Cultural anthropologyCultural anthropologyCultural anthropology is a branch of anthropology focused on the study of cultural variation among humans. It is in contrast to social anthropology, which perceives cultural variation as a subset of a posited anthropological constant. The term sociocultural anthropology includes both cultural and social anthropology traditions.Biological anthropologyBiological anthropologyBiological anthropology, also known as physical anthropology, is a natural science discipline concerned with the biological and behavioral aspects of human beings, their extinct hominin ancestors, and related non-human primates, particularly from an evolutionary perspective. This subfield of anthropology systematically studies human beings from a biological perspective.North AmericaNorth AmericaNorth America is a continent in the Northern and Western hemispheres. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Caribbean Sea, and to the south and west by the Pacific Ocean. North America covers an area of around 24,709,000 square kilometers (9,540,000 square miles), representing approximately 16.5% of Earth's land area and 4.8% of its total surface area.OrnithologyOrnithologyScientific study of birdsA marbled godwit being ringed for studies on bird migrationOrnithology (from Ancient Greek ὄρνις (órnis) 'bird' and λόγος (lógos) 'study of') is a branch of zoology dedicated to the study of birds. Several aspects of ornithology differ from related disciplines, due partly to the high visibility and the aesthetic appeal of birds.Natural historyNatural historyNatural history is a domain of inquiry involving organisms, including animals, fungi, and plants, in their natural environment, leaning more towards observational than experimental methods of study. A person who studies natural history is called a naturalist or natural historian. Natural history encompasses scientific research but is not limited to it.

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