Shortened Telomeres - the extinction of mankind?
Sunday, July 19th, 2009Large scale extinctions, like the dinosaurs, account for only 4% of the disappearance of animals from the earth. The rest die off quietly, without meteors or other major events to hurry them along. What causes these silent extinctions has puzzled scientists for generations. Now, there may be an answer. At the end of the chromosomes of every species (except bacteria and algae) are small protective caps called telomeres. When a cell dies, it tries to replicate these caps, but as a species goes on, the caps grow shorter and shorter, resulting in genetic abnormalities, such as cancer and immunodeficiency (think AIDS). This shortening, they theorize, will eventually cause the collapse of the species. More study is necessary at this point, and the new genetic mapping projects will be extremely helpful, but one can’t help but wonder about the future of our own species. Will we be able to genetically alter our destiny in the lab, artificially lengthening the telomeres, or will our species crash and burn, like so many before?