Are Humans Still Evolving?

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PostTue Oct 20, 2009 8:30 pm » by Savwafair2012

Are Humans Still Evolving? Absolutely, Says A New Analysis Of A Long-term Survey Of Human Health
ScienceDaily (Oct. 20, 2009) — Although advances in medical care have improved standards of living over time, humans aren't entirely sheltered from the forces of natural selection, a new study shows.
There is this idea that because medicine has been so good at reducing mortality rates, that means that natural selection is no longer operating in humans," said Stephen Stearns of Yale University.

A recent analysis by Stearns and colleagues turns this idea on its head. As part of a working group sponsored by the National Evolutionary Synthesis Center in Durham, NC, the team of researchers decided to find out if natural selection — a major driving force of evolution — is still at work in humans today. The result? Human evolution hasn't ground to a halt. In fact, we're likely to evolve at roughly the same rates as other living things, findings suggest.

Taking advantage of data collected as part of a 60-year study of more than 2000 North American women in the Framingham Heart Study, the researchers analyzed a handful of traits important to human health. By measuring the effects of these traits on the number of children the women had over their lifetime, the researchers were able to estimate the strength of selection and make short-term predictions about how each trait might evolve in the future. After adjusting for factors such as education and smoking, their models predict that the descendents of these women will be slightly shorter and heavier, will have lower blood pressure and cholesterol, will have their first child at a younger age, and will reach menopause later in life.

"The take-home message is that humans are currently evolving," said Stearns. "Natural selection is still operating."

The changes may be slow and gradual, but the predicted rates of change are no different from those observed elsewhere in nature, the researchers say. "The evolution that's going on in the Framingham women is like average rates of evolution measured in other plants and animals," said Stearns. "These results place humans in the medium-to-slow end of the range of rates observed for other living things," he added. "But what that means is that humans aren't special with respect to how fast they're evolving. They're kind of average."

Additional authors on the study were Sean Byars of Yale University, Douglas Ewbank of the University of Pennsylvania, and Diddahally Govindaraju of Boston University.
The team's findings were published online in the October 19th issue of Proceedings of the National Academy of Sciences.

The National Evolutionary Synthesis Center (NESCent) is an NSF-funded collaborative research center operated by Duke University, the University of North Carolina at Chapel Hill, and North Carolina State University.

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PostSat Oct 24, 2009 11:22 pm » by Heinousone

I think the evolutionary cycle of a species is much beyond our means to stop it. What we Can influence is the level of which those evolutions will happen. We have moved ourself past the level of mere survival evolution. We can then evolve in other ways.

One of the greatest issues of our period is the amount of lies and false truths we have pressed upon us and we now can see how detrimental it is to our survival. How would a species evolve in order to overcome such and no longer be able to be so easily manipulated?

Well....that depends upon how and when the manipulation happens. In our cases it always starts at the childhood state. Now...have we seen any mass changes in children that makes it so they have a harder time paying attention during that age of their lives?

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PostSun Oct 25, 2009 12:43 pm » by Ogmios

I think we are probably still evolving physically to some extent. However, our brains could be evolving at an much faster rate. When you look at the amount of imagery the average brain has to deal with it's likely, I think, that brains will have to evolve or we might just hit meltdown. Maybe it's happening already.
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PostSun Oct 25, 2009 7:50 pm » by Danijeel

Some quotes by Gurdjieff on evolution.

"There is no compulsory, mechanical evolution.
Evolution is the result of conscious struggle."

"The evolution of man is the evolution of his consciousness, and 'consciousness' cannot evolve unconsciously.
The evolution of man is the evolution of his will, and 'will' cannot evolve involuntarily.
The evolution of man is the evolution of his power of doing, and 'doing' cannot be the result of things which 'happen'."

"The evolution of man can be taken as the development in him of those powers and possibilities which never develop by themselves, that is, mechanically.
Only this kind of development, only this kind of growth, marks the real evolution of man.
There is, and there can be, no other kind of evolution whatever. ".

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