Word: span
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...record numbers, they are lapping up a freshet of books about how to turn back the clock. Life expectancy in the U.S. is at an all-time high. A newborn boy can expect to reach 73.4 years, and a newborn girl 79.3. But extensions of the average life span apparently just make us greedy for a longer, healthier life. That's where fountain-of-youth books come in. Depending upon the author, they promise to help you live longer--to 100 or even beyond...
Feel 30 for the Next 50 Years by David W. Johnson (Avon) stresses that it's not enough merely to extend your life span; it's the youth span that's critical. "Youth span refers only to the number of years we live in good health, with high energy, strength and mobility, and with vigorous mental, sensory and sexual powers," Johnson says. He points to the readily observable fact that at a college reunion, some people have aged more than others: "You do not need to be a molecular biologist to conclude that something (or some things) other than simply...
...Laura Tyson, formerly Clinton's top economist. But the reason people are talking about Face-Time, which Tarloff began long before the Gap dress went under an FBI microscope, isn't that it offers an insider's look at explicit sex. These days you can get that on C-SPAN. In fact, the book's treatment of matters of the flesh is almost quaint; unlike Ken Starr, Tarloff leaves most of the steamy stuff to one's imagination...
...terms of aging. As we grow older, changes occur in our cells that reduce the number of times they can reproduce. This clock of age is reset by normal reproduction during the production of sperm and eggs; that is why children of each new generation have a full life span. It is not yet known whether aging is reversed during cloning or if the clone's natural life is shortened by the years its parent has already lived. Then there is the problem of the genetic errors that accumulate in our cells. There are systems to seek out and correct...
Scientists have tried ever since to reactivate the enzyme that lengthens the tips, known as telomeres. Last January they succeeded: Andrea Bodnar and colleagues from the Geron Corp. in Menlo Park, Calif., activated the enzyme telomerase, extended the telomeres and lengthened the life-span of cells in culture by at least 20 divisions past the Hayflick limit. In November, Geron scored another first by reconstituting the telomeres of embryonic stem cells, which are renowned for their ability to turn into any type of cell, making it theoretically possible to rejuvenate parts of any organ with a simple injection...