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Latest Natural selection Stories

2013-09-18 15:43:41

Saving energy is important for humans and animals alike when resources are limited. Scientists at the Research Institute of Wildlife Ecology of the University of Veterinary Medicine, Vienna, found out that although higher-ranked red deer gain privileged access to patches of food, they also have higher metabolic rates and thus use more energy. This can be a serious disadvantage in winter when red deer rely largely on their limited stored body fat to survive. Energy budget adjustments...

Females Choose Biological Fitness Over Other Traits In Mating Game
2013-06-20 10:46:19

National Institute for Mathematical and Biological Synthesis When a new species emerges following adaptive changes to its local environment, the process of choosing a mate can help protect the new species' genetic identity and increase the likelihood of its survival. But of the many observable traits in a potential mate, which particular traits does a female tend to prefer? A new study from the National Institute for Mathematical and Biological Synthesis finds that a female's mating...

2013-05-22 10:17:41

Rice computational study tracks E. coli cells´ regulatory mechanisms Environment is not the only factor in shaping regulatory patterns – and it might not even be the primary factor, according to a new Rice University study that looks at how cells´ protein networks relate to a bacteria´s genome. The Rice lab of computer scientist Luay Nakhleh reported in the Proceedings of the National Academy of Sciences that when environmental factors are eliminated from an...

Natural Selection Keeps Up As People Live Longer And Reproduce Less
2013-04-25 15:59:54

Cell Press In many places around the world, people are living longer and are having fewer children. But that's not all. A study of people living in rural Gambia, published in the Cell Press journal Current Biology on April 25, shows that this modern-day "demographic transition" may lead women to be taller and slimmer, too. "This is a reminder that declines in mortality rates do not necessarily mean that evolution stops, but that it changes," says Ian Rickard of Durham University in the...

Evolution Of Bacteria Has Become Predictable
2013-02-20 19:24:20

Brett Smith for redOrbit.com — Your Universe Online The principles of evolution are widely accepted, but the causes and mechanisms that drive evolution are still heavily debated. In a new study published in the open access journal PLOS Biology, two researchers found similar or identical genetic mutations can emerge in separate populations of E. coli evolving in different environments for over 1000 generations, leading the team to conclude that evolution can be fairly...

Mutant Champions Save Vulnerable Species From Almost-certain Extinction
2013-02-20 12:52:16

University of Washington Species facing widespread and rapid environmental changes can sometimes evolve quickly enough to dodge the extinction bullet. Populations of disease-causing bacteria evolve, for example, as doctors flood their “environment,” the human body, with antibiotics. Insects, animals and plants can make evolutionary adaptations in response to pesticides, heavy metals and overfishing. Previous studies have shown that the more gradual the change, the better the...

Genetic Variation Helped Humans Evolve, Adapt To Climate Changes
2013-02-15 10:05:03

[Watch Video: 2 Studies Reveal Genetic Variation That Drives Human Evolution] April Flowers for redOrbit.com - Your Universe Online New light has been shed on a genetic variation that may have played a key role in human evolution by two studies published by an international group of researchers this week in the journal Cell. To understand a gene variant that might have helped humans adapt to humid climates, the research team used an animal model, along with whole-genome sequencing...

2012-12-29 05:00:30

In a comparison made between the actual progress of evolution and how it would have progressed if the mechanism had been genetic mutation and natural selection, the two progress in opposite directions. According to website http://www.takeondarwin.com, claims made for the Modern Synthesis are contradicted by what is known of the actual progress of evolution. ROSENDALE, NY (PRWEB) December 28, 2012 In Evolution Issue of the Month 8 published on the website http://www.takeondarwin.com...

2012-12-01 05:04:00

Does believing in evolution inevitably involve believing in determinism--that all human behavior and thinking is entirely subject to physical laws? Or can there be choice in the matter? Finding logic inadequate to resolve the issue, a new article posted on http://www.takeondarwin.com includes parables pitting feelings against logic. ROSENDALE, NY (PRWEB) November 30, 2012 Two stories published at http://www.takeondarwin.com challenge the assumption that, since humans evolved through purely...

Gene Mutations Begin Showing Up In Last 5,000 Years Of Human Evolution
2012-11-29 10:51:10

Lawrence LeBlond for redOrbit.com - Your Universe Online In a world that´s more than 4 billion years old, humans have only existed for a fraction of that–roughly 200,000 years. In those 200,000 years of existence, not a lot is known about genetic mutation until we close in on the last 5 to 10 thousand years. It is within that time that researchers believe nearly 75 percent of gene mutations have occurred, making our DNA distinctly different now than it was way back when. This...


Word of the Day
sough
  • A murmuring sound; a rushing or whistling sound, like that of the wind; a deep sigh.
  • A gentle breeze; a waft; a breath.
  • Any rumor that engages general attention.
  • A cant or whining mode of speaking, especially in preaching or praying; the chant or recitative characteristic of the old Presbyterians in Scotland.
  • To make a rushing, whistling, or sighing sound; emit a hollow murmur; murmur or sigh like the wind.
  • To breathe in or as in sleep.
  • To utter in a whining or monotonous tone.
According to the OED, from the 16th century, this word is 'almost exclusively Scots and northern dialect until adopted in general literary use in the 19th.'
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