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Latest Selection Stories

Man’s New Best Friend Is A Rat
2012-12-28 10:45:05

Alan McStravick for redOrbit.com — Your Universe Online The dog has been caught unaware by a competitor for man´s affections. And sure, the dog has a strong foothold on its title of ℠Man´s Best Friend´. But this new species angling for the position of top dog and the surreptitious behavior it displays in doing so can only lead one to surmise that this animal is acting, well, like a rat. The reason one might perceive the rat´s march toward domesticity as...

2012-08-13 11:12:47

Max Planck scientist investigates the evolutionary model of Muller's ratchet From protozoans to mammals, evolution has created more and more complex structures and better-adapted organisms. This is all the more astonishing as most genetic mutations are deleterious. Especially in small asexual populations that do not recombine their genes, unfavorable mutations can accumulate. This process is known as Muller's ratchet in evolutionary biology. The ratchet, proposed by the American geneticist...

2012-08-04 02:32:38

Why do adults continue to play throughout their lives while most other mature mammals cease such behavior? According to researchers at Penn State, playfulness may serve an evolutionary role in human mating preferences by signaling positive qualities to potential long-term mates. "Humans and other animals exhibit a variety of signals as to their value as mates," said Garry Chick, professor and head of the Department of Recreation, Park and Tourism Management. "Just as birds display bright...

2012-07-16 23:03:08

Where´s the white hot furnace that powers evolution? For Darwin it lay in natural selection. The “Modern Synthesis” relocated it to genetic mutation. In the third of a series of articles published at http://www.takeondarwin.com, Contrarian Evolutionist author Shaun Johnston relocates it once again, to wherever variations in living creatures are created. (PRWEB) July 16, 2012 Modern evolutionary theory is the opposite of what people assumed when they first wondered what made...

2012-06-28 20:25:11

Frequency-dependent selection fosters the diversity of populations but does not always increase the average fitness of the population. Genetic diversity arises through the interplay of mutation, selection and genetic drift. In most scientific models, mutants have a fitness value which remains constant throughout. Based on this value, they compete with other types in the population and either die out or become established. However, evolutionary game theory considers constant fitness values...

2012-06-26 14:33:19

A classic study from more than 60 years ago suggesting that males are more promiscuous and females more choosy in selecting mates may, in fact, be wrong, say life scientists who are the first to repeat the historic experiment using the same methods as the original. In 1948, English geneticist Angus John Bateman published a study showing that male fruit flies gain an evolutionary advantage from having multiple mates, while their female counterparts do not. Bateman's conclusions have...

2012-05-29 23:03:23

Darwin made adaptation to the environment the key property of evolved living creatures. That's all natural selection can do. But suppose the key property of living creatures is how independent of their environment they are. This is number 1 in a series of website articles casting doubt on the Modern Synthesis. Rosendale, NY (PRWEB) May 29, 2012 In Darwin's theory of natural selection the key concept is "adaptation to the environment." All natural selection could do was identify which...

Darwinian Selection Continues To Influence Human Evolution
2012-04-30 14:25:37

New evidence proves humans are continuing to evolve and that significant natural and sexual selection is still taking place in our species in the modern world. Despite advancements in medicine and technology, as well as an increased prevalence of monogamy, research reveals humans are continuing to evolve just like other species. Scientists in an international collaboration, which includes the University of Sheffield, analyzed church records of about 6,000 Finnish people born between...

2012-04-19 11:23:56

Study of simple organisms reveals preference for those who resemble themselves In a dog-eat-dog world of ruthless competition and 'survival of the fittest,' new research from the University of Leicester reveals that individuals are genetically programmed to work together and cooperate with those who most resemble themselves. A tendency for similar individuals to cooperate selectively with one another, even if they are not close relatives, can evolve spontaneously in simple organisms....

Social Networks Provide Clues To Natural Selection
2012-02-01 05:04:07

Think of them as a group of guys, hanging out together, but not spending much time with the ladies, nor getting much "action." Except these "guys" are forked fungus beetles. Forked what? Yes, forked fungus beetles. Like other insects and animals, they have their own societies. Most are highly social, but some hang out in small guy groups. It turns out, maybe not surprisingly, that the cliquish ones — the small groups of male beetles that live on the fringes of society with their...


Word of the Day
caparison
  • A cloth or covering, more or less ornamented, laid over the saddle or furniture of a horse, especially of a sumpter-horse or horse of state.
  • Clothing, especially sumptuous clothing; equipment; outfit.
  • To cover with a caparison, as a horse.
  • To dress sumptuously; adorn with rich dress.
This word ultimately comes from the Medieval Latin 'cappa,' cloak.
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