Many extinct species—from the passenger pigeon to the woolly mammoth—might now be reclassified as “bodily, but not genetically, extinct.” They’re dead, but their DNA is recoverable from museum specimens and fossils, even those up to 200,000 years old.
Thanks to new developments in genetic technology, that DNA may eventually bring the animals back to life. Only species whose DNA is too old to be recovered, such as dinosaurs, are the ones to consider totally extinct, bodily and genetically.
But why bring vanished creatures back to life? It will be expensive and difficult. It will take decades. It won’t always succeed. Why even try?
Excerpt from an article written by Stewart Brand for National Geographic News. Continue THERE
The very idea of an “ought” is foreign to evolutionary theory. It makes no sense for a biologist to say that some particular animal should be more cooperative, much less to claim that an entire species ought to aim for some degree of altruism. If we decide that we should neither “dissolve society” through extreme selfishness, as Wilson puts it, nor become “angelic robots” like ants, we are making an ethical judgment, not a biological one. Likewise, from a biological perspective it has no significance to claim that I should be more generous than I usually am, or that a tyrant ought to be deposed and tried. In short, a purely evolutionary ethics makes ethical discourse meaningless.
Excerpt from an article written by RICHARD POLT, NYT. Continue HERE
As a 42-year-old man born in England, I can expect to live for about another 38 years. In other words, I can no longer claim to be young. I am, without doubt, middle-aged.
To some people that is a depressing realization. We are used to dismissing our fifth and sixth decades as a negative chapter in our lives, perhaps even a cause for crisis. But recent scientific findings have shown just how important middle age is for every one of us, and how crucial it has been to the success of our species. Middle age is not just about wrinkles and worry. It is not about getting old. It is an ancient, pivotal episode in the human life span, preprogrammed into us by natural selection, an exceptional characteristic of an exceptional species.
Compared with other animals, humans have a very unusual pattern to our lives. We take a very long time to grow up, we are long-lived, and most of us stop reproducing halfway through our life span. A few other species have some elements of this pattern, but only humans have distorted the course of their lives in such a dramatic way. Most of that distortion is caused by the evolution of middle age, which adds two decades that most other animals simply do not get.
Excerpt of an article written by David Bainbridge, WP. Continue HERE