Word: whether
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Dates: during 1990-1999
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...turn stimulates new vessel growth. In a few years, predicts William Haseltine, the biotech industry's champion optimist and CEO of Human Genome Sciences, based in Rockville, Md., we will have genetically based drugs for almost every serious ailment--"things we couldn't really work on well before, whether it's osteoporosis or Alzheimer's." Nor will these drugs simply attack symptoms, as aspirin does. "That's a chemical crutch," he says. In the new genomics, as Haseltine calls it, "it's the human gene, the human protein, the human cell--and not the chemical--that is used...
...idea of implanting brain stem cells, while not as dramatic as swapping whole brains, also raises intriguing philosophical questions. "Sometimes at seminars when I talk about my work," says Snyder, "somebody will ask me whether the introduction of these stem cells will alter memory." Do the newly generated cells distort or erase old memories? Or will the transplanted stem cells bring with them memories of their upbringing in a Petri dish...
...Whether growing nerves will reconnect properly--ensuring that a signal sent to a leg doesn't wind up at an arm--has always been a cause for concern. But there may be little reason to worry. Researchers now believe that advancing nerve endings carry chemical markers that guide them straight to receptors at their destination. "It's as if the body wants to be whole," says Reeve...
What's missing from the debate is an understanding of the changing relationship between humanity and nature. For it is how humans fit into the natural world that will settle whether Malthus was right or wrong. He was wrong in 1798. But if he had been writing 10,000 years earlier, before agriculture, he would have been right. And were his book being published today, on the brink of the third millennium, he would be more right than wrong. Let me explain...
...been operating ever since the earth formed. Without it, the surface of the globe would be a frigid -20[degrees]C (-4[degrees]F), the oceans would have frozen, and no life would have developed. So the issue we face in the next millennium is not whether there will be a greenhouse effect, but whether humans, by burning fossil fuels, are adding enough carbon dioxide to the atmosphere to change it (and our climate) in significant ways...