Population
hideIn biology, a population is the collection of inter-breeding organisms of a particular species; in sociology, a collection of human beings. Individuals within a population share a factor may be reduced by statistical means, but such a generalization may be too vague to imply anything. Demography is used extensively in marketing, which relates to economic units, such as retailers, to potential customers. For example, a coffee shop that wants to sell to a younger audience looks at the demographics of an area to be able to appeal to this younger audience.
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News tagged with population
Physicists Show that Correlated Environmental Variations Can Quicken Extinctions
Jan 13, 2009 |
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(PhysOrg.com) -- In general, population extinction is a natural process. For one reason or another, an estimated 99.9% of all species that have lived on Earth are now extinct. However, the reasons for a species ...
Genetic study clarifies African and African-American ancestry
Dec 21, 2009 |
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People who identify as African-American may be as little as 1 percent West African or as much as 99 percent, just one finding of a large-scale, genome-wide study of African and African-American ancestry released ...
California's Ancient Kelp Forest
Nov 10, 2009 |
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(PhysOrg.com) -- The kelp forests off southern California are considered to be some of the most diverse and productive ecosystems on the planet, yet a new study indicates that today's kelp beds are less extensive and lush ...
Why sex with a partner is better (w/ Video)
Oct 21, 2009 |
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(PhysOrg.com) -- OK, it takes two for human reproduction, and now it seems that plants and animals that can rely on either a partner or go alone by self-fertilization give their offspring a better chance for ...
Buried Coins Key to Roman Population Mystery?
Oct 05, 2009 |
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(PhysOrg.com) -- The first century BC in Italy was culturally a brilliant age, unequaled by any other period in Roman history. It was a time of Cicero, Caesar, Vergil, Horace and many other major literary ...
Study: Life and death during the Great Depression
Other Sciences / Social Sciences
Sep 28, 2009 |
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The Great Depression had a silver lining: During that hard time, U.S. life expectancy actually increased by 6.2 years, according to a University of Michigan study published in the current issue of the Proceedings of the Na ...
Study confirms classic theory on the origins of biodiversity
Sep 09, 2009 |
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(PhysOrg.com) -- A Cornell study on the diversity of milkweed plants has used new techniques to prove an old theory that explains how the arms race between attacking insects and defended plants led to great ...
Study finds human population expanded during late Stone Age
Jul 29, 2009 |
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Genetic evidence is revealing that human populations began to expand in size in Africa during the Late Stone Age approximately 40,000 years ago. A research team led by Michael F. Hammer (Arizona Research Laboratory's Division ...
Researchers Find Key 'Conductor' of Nature's Synchronicity
Jul 22, 2009 |
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(PhysOrg.com) -- Synchronicity in nature is seen in beating hearts, the flashing of fireflies' lights, the ebb and flow of infectious disease—and the simultaneous rise and fall of populations across vast reaches ...
Australia discovered by the 'Southern Route'
Jul 21, 2009 |
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Genetic research indicates that Australian Aborigines initially arrived via south Asia. Researchers writing in the open access journal BMC Evolutionary Biology have found telltale mutations in modern-day Indian populations that a ...
Did the North Atlantic fisheries collapse due to fisheries-induced evolution?
May 27, 2009 |
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The Atlantic cod has, for many centuries, sustained major fisheries on both sides of the Atlantic. However, the North American fisheries have now largely collapsed. A new paper in the open-access, peer-reviewed journal PLoS ON ...
Seeing beyond the invisible: Scientists find formula to uncover our planet’s past and help predict its future
May 27, 2009 |
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(PhysOrg.com) -- Studies of climate evolution and the ecology of past-times are often hampered by lost information - lost variables needed to complete the picture have been long thought untraceable but scientists ...
New analysis shows 'hobbits' couldn't hustle
Other Sciences / Archaeology & Fossils
May 06, 2009 |
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A detailed analysis of the feet of Homo floresiensis—the miniature hominins who lived on a remote island in eastern Indonesia until 18,000 years ago -- may help settle a question hotly debated among paleontologists: how si ...
Geneticists publish largest-ever study on African genetics revealing origins, migration
Apr 30, 2009 |
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African, American, and European researchers working in collaboration over a 10-year period have released the largest-ever study of African genetic data--more than four million genotypes--providing a library of new information ...
Native Americans descended from a single ancestral group, DNA study confirms
Apr 29, 2009 |
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For two decades, researchers have been using a growing volume of genetic data to debate whether ancestors of Native Americans emigrated to the New World in one wave or successive waves, or from one ancestral ...
