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Susan J. Crockford
Susan Janet Crockford (born 1954) is a Canadian contract scientist who runs a small business identifying bones and other items in scat of wildlife. She is a blogger who writes about zoology and climate science, specializing in Holocene mammals. From 2004 to 2019 she was an adjunct professor in Anthropology at the University of Victoria. She is known for her blog posts on polar bear biology, which are unsupported by the scientific literature and oppose the scientific consensus that polar bears are threatened by ongoing climate change. Early life and education Crockford first gained her interest in the Arctic in elementary school, when she read about Inuit life and Arctic fauna. Her scientific interest in the Arctic was stoked when she received her first Alaskan Malamute at age eleven. Crockford received her Bachelor of Science in Zoology at the University of British Columbia in 1976 and her doctorate in Interdisciplinary Studies from the University of Victoria in 2004. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canada
Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by total area. Its southern and western border with the United States, stretching , is the world's longest binational land border. Canada's capital is Ottawa, and its three largest metropolitan areas are Toronto, Montreal, and Vancouver. Indigenous peoples have continuously inhabited what is now Canada for thousands of years. Beginning in the 16th century, British and French expeditions explored and later settled along the Atlantic coast. As a consequence of various armed conflicts, France ceded nearly all of its colonies in North America in 1763. In 1867, with the union of three British North American colonies through Confederation, Canada was formed as a federal dominion of four provinces. This began an accretion of provinces an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Speciation
Speciation is the evolutionary process by which populations evolve to become distinct species. The biologist Orator F. Cook coined the term in 1906 for cladogenesis, the splitting of lineages, as opposed to anagenesis, phyletic evolution within lineages. Charles Darwin was the first to describe the role of natural selection in speciation in his 1859 book ''On the Origin of Species''. He also identified sexual selection as a likely mechanism, but found it problematic. There are four geographic modes of speciation in nature, based on the extent to which speciating populations are isolated from one another: allopatric speciation, allopatric, peripatric speciation, peripatric, parapatric speciation, parapatric, and sympatric speciation, sympatric. Speciation may also be induced artificially, through animal husbandry, agriculture, or laboratory experiments of speciation, laboratory experiments. Whether genetic drift is a minor or major contributor to speciation is the subject of much ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Heartland Institute
The Heartland Institute is an American conservative and libertarian public policy think tank known for its rejection of both the scientific consensus on climate change and the negative health impacts of smoking. Founded in 1984, it worked with tobacco company Philip Morris throughout the 1990s to attempt to discredit the health risks of secondhand smoke and lobby against smoking bans. Since the 2000s, the Heartland Institute has been a leading promoter of climate change denial. History The institute was founded in 1984 by Chicago investor David H. Padden, who served as the organization's chairman until 1995. Padden had been a director of the Cato Institute, a libertarian think tank headquartered in Washington, D.C., since its founding as the Charles Koch Foundation in 1974. Padden was also a former director of Citizens for a Sound Economy, the Acton Institute, the Foundation for Economic Education, and the Center for Libertarian Studies. At age 26, Joseph L. Bast became He ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Conference On Climate Change
The International Conference on Climate Change (ICCC) is a conference series organized and sponsored by The Heartland Institute which aims to bring together those who "dispute that the science is settled on the causes, consequences, and policy implications of climate change." The first conference took place in 2008. First conference, March 2008 The first conference was held in New York City. Speakers included climatologist Patrick J. Michaels and physicist S. Fred Singer. Nongovernmental International Panel on Climate Change The conference endorsed the work of the Nongovernmental International Panel on Climate Change (NIPCC), which is a group of climate change deniers led by Fred Singer that disputes the positions of the United Nations Intergovernmental Panel on Climate Change (IPCC). Singer prepared a critique of the IPCC Fourth Assessment Report called "Nature, Not Human Activity, Rules the Climate". This NIPCC report was published in March 2008 by the Heartland Institu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ian Stirling (biologist)
Ian Grote Stirling (born September 26, 1941) is a research scientist emeritus with Environment and Climate Change Canada and an adjunct professor in the University of Alberta Department of Biological Sciences. His research has focused mostly on Arctic and Antarctic zoology and ecology, and he is one of the world's top authorities on polar bears. Stirling has written five books and more than 150 articles published in peer-reviewed scientific journals. He has written and spoken extensively about the danger posed to polar bears by global warming. Early life and education Ian Stirling was born to Andrew and Margaret Stirling on September 26, 1941. He completed his B.Sc. at the University of British Columbia (UBC) in 1963, and his M.Sc. in zoology at UBC in 1965. For his M.Sc. thesis, Stirling studied captive blue grouse under James F. Bendell. Stirling obtained his Ph.D. in 1968. Career From 1970 to 2007, Stirling served as a research scientist for the Canadian Wildlife Service, focus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steven Amstrup
Steven C. Amstrup (born February 4, 1950) is an American zoologist who studies bears, especially polar bears. He is the 2012 recipient of the Indianapolis Prize. Early life Steven Amstrup was born in Fargo, North Dakota, where he took an interest in bears at an early age. He attended the University of Washington as an undergraduate, receiving his bachelor's degree in forestry in 1972. In 1975, he graduated from the University of Idaho with a master's degree in wildlife management. He studied black bears in central Idaho for his master's thesis. He earned his doctoral degree from the University of Alaska Fairbanks in 1995. In 1975, he began working for the United States Fish and Wildlife Service in Wyoming where he studied pronghorn antelope and sharp-tailed grouse. In 1980 he moved to Alaska where he took over the United States Fish and Wildlife Service's fledgling Polar Bear Research Project. In 1996 Amstrup's research position was transferred to the United States Geological ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polar Bear - Alaska (cropped)
Polar may refer to: Geography Polar may refer to: * Geographical pole, either of two fixed points on the surface of a rotating body or planet, at 90 degrees from the equator, based on the axis around which a body rotates *Polar climate, the climate common in polar regions * Polar regions of Earth, locations within the polar circles, referred to as the Arctic and Antarctic Places *Polar, Wisconsin, town in Langlade County, Wisconsin, United States **Polar (community), Wisconsin, unincorporated community in Langlade County, Wisconsin, United States People * Polar (musician), Norwegian electronic music producer Arts, entertainment and media Music Labels and studios * Polar Music, a record label * Polar Studios, music studio of ABBA in Sweden Albums * ''Polar'' (album), second album by the High Water Marks * ''Polars'' (album), an album by the Dutch metal band, Textures Other uses in arts, entertainment and media * ''Polar'' (webcomic), a webcomic and series of graphic no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Origin Of The Domestic Dog
The domestication of the dog was the process which created the domestic dog. This included the dog's genetic divergence from the wolf, its domestication, and the emergence of the first dogs. Genetic studies show that all ancient and modern dogs share a common ancestry and descended from an ancient, now-extinct wolf population – or closely related wolf populations – which was distinct from the Wolf, modern wolf lineage. The dog's similarity to the grey wolf is the result of substantial dog-into-wolf gene flow, with the modern grey wolf being the dog's nearest living relative. An extinct Pleistocene wolf, Late Pleistocene wolf may have been the ancestor of the dog. The dog is a member of the Evolution of the wolf#Wolf-like canids, wolf-like canids. The genetic divergence between the dog's ancestor and modern wolves occurred between 40,000 and 30,000 years ago, just before or during the Last Glacial Maximum (20,000–27,000 years ago). This timespan represents the upper time-limi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Domestication
Domestication is a sustained multi-generational relationship in which humans assume a significant degree of control over the reproduction and care of another group of organisms to secure a more predictable supply of resources from that group. A broader biological definition is that it is a coevolutionary process that arises from a mutualism, in which one species (the domesticator) constructs an environment where it actively manages both the survival and reproduction of another species (the domesticate) in order to provide the former with resources and/or services. The domestication of plants and animals by humans was a major cultural innovation ranked in importance with the conquest of fire, the manufacturing of tools, and the development of verbal language. Charles Darwin recognized the small number of traits that made domestic species different from their wild ancestors. He was also the first to recognize the difference between conscious selective breeding (i.e. artificial se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homeostasis
In biology, homeostasis (British English, British also homoeostasis) Help:IPA/English, (/hɒmɪə(ʊ)ˈsteɪsɪs/) is the state of steady internal, physics, physical, and chemistry, chemical conditions maintained by organism, living systems. This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range). Other variables include the pH of extracellular fluid, the concentrations of sodium, potassium and calcium ions, as well as that of the blood sugar level, and these need to be regulated despite changes in the environment, diet, or level of activity. Each of these variables is controlled by one or more regulators or homeostatic mechanisms, which together maintain life. Homeostasis is brought about by a natural resistance to change when already in the optimal conditions, and equilibrium is maintained by many regulatory mechanisms: it is thought to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. 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 west and south by the Pacific Ocean. Because it is on the North American Plate, North American Tectonic Plate, Greenland is included as a part of North America geographically. North America covers an area of about , about 16.5% of Earth's land area and about 4.8% of its total surface. North America is the third-largest continent by area, following Asia and Africa, and the list of continents and continental subregions by population, fourth by population after Asia, Africa, and Europe. In 2013, its population was estimated at nearly 579 million people in List of sovereign states and dependent territories in North America, 23 independent states, or about 7.5% of the world's population. In Americas (terminology)#Human ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birds
Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the bee hummingbird to the ostrich. There are about ten thousand living species, more than half of which are passerine, or "perching" birds. Birds have whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming. B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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