Word: effectiveness
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Shedding Our DNA Chains The article on epigenetics was thought provoking [Jan. 18]. I had always considered that natural selection was too slow and random a process to allow the animal kingdom to successfully deal with environmental change. I am now filled with hope and trepidation about the effects that future environmental challenges will have on the human race. If physiological conditioning can have a transient effect on our gene activity, then can sociological conditioning also determine the traits of future genetics such as physical appearance, attraction, sexual orientation, academic and sporting prowess? Are changes in epigenetic marks the driving...
...patients can benefit from this emerging science, I can attest that most have never heard of epigenetics. Yet everything in our environment - the way we think and feel, our exposure to stress - affects the way our DNA is expressed. Once we understand this premise, we can incorporate strategies to effect epigenetic changes - including neurogenesis, the growth of new nerve tissue in the brain. Brenda Stockdale Atlanta...
...their destiny." However, he misses one point that is key to Haiti's becoming self-sustaining, and that is cultural change. The mix of West African religious and cultural influences prevalent in the country, like voodoo, sends the message that life is dictated by magic, and planning has no effect on the future. Haitian culture must be redeveloped and restructured, and although the circumstances are tragic, this is a time to change in order for the country to move forward and, as Clinton puts it, "escape the chains of the past 200 years...
...Good, reported that the number of donations nearly doubled last year, and the dollar value of donations increased by 42 percent. However, trends in online giving, including cutting-edge methods like text-message donations, vary markedly from traditional non-profit donations, and their growing importance will have a significant effect on the quantity and character of charity worldwide, and not necessarily a positive...
...trees suck up more carbon, they also produce more dark, heat-absorbing foliage, which somewhat counteracts the benefit. In addition, one extra tree per acre per year doesn't make much of a dent in the atmospheric carbon load, not to mention that it's still unknown what the effect would be in other kinds of forests...