July 27, 1990 |
With the help of the humble guppy, California biologists have verified a standard theory on how natural selection molds the reproductive behavior of a species. The process has been demonstrated innumerable times in laboratory studies. "But when the (experiment) is played out in the real world, with all the vagaries of nature, it might not come out the same way," said David A. Reznick of UC Riverside. "There is something special about doing it in the real world," he added.
October 9, 2012 |
Two scientists who upended fundamental beliefs about biology by demonstrating that every cell in the body has the potential to grow into every other type of cell have won the Nobel Prize in physiology or medicine. Sir John Gurdon and Dr. Shinya Yamanaka were honored Monday for "the discovery that mature cells can be reprogrammed" to return to a very early state of development, the Nobel committee said in its citation. Their research is still years away from yielding a clear breakthrough in medical treatment.
CALIFORNIA | LOCAL
May 9, 1996 |
In a windowless underground laboratory, a Caltech grad student squirts water into the brain of an anesthetized locust. He keeps his eyes on the dropper as measured moisture falls into the bug's brain. "He's getting dry," Michael Wehr explains. The bug says nothing. That is, the electron conductors poking at two specific neurons in the olfactory portion of the locust's brain say nothing. The bug is not giving any readings--yet.
August 25, 2001 |
A privately funded Harvard University researcher will soon begin creating stem cell lines for himself and other academic researchers from discarded embryos provided by a large Boston fertility clinic, an arrangement that could dramatically enhance the supply of cells available for study.
April 15, 1995 |
For centuries, Americans have classified themselves and their neighbors by the color of their skin. Belief in the reality of race is at the heart of how people traditionally perceive differences in those around them, how they define themselves and even how many scientists say humanity evolved.
January 22, 2004 |
Male babies surgically turned into girls at birth because of a rare birth defect frequently continue to feel like boys and may eventually switch their gender back to male, even with no knowledge of their history, according to a new study. The finding, reported in the current issue of the New England Journal of Medicine, suggests there is an intrinsic, biologically determined feeling of sexual identity that is hard to override through rearing, experts said.
May 8, 2006 |
SOMEWHERE, in most women's conscious or unconscious minds, is the unspoken expectation that, if their marriages or relationships last, they will most likely outlive their partners. They know that their children, for whom they're primarily in charge, will grow up and leave. And they face a barrage of advertising and other societal cues that subtly but ever so steadily suggest that they're not getting older, they're getting invisible.
August 30, 1991 |
A tiny segment of the brain believed to govern sexual activity is smaller in gay men than in heterosexuals, a trait that offers the first specific evidence of a biological cause for homosexuality, a San Diego researcher has reported. His conclusions, to be published today in the journal Science, are certain to enliven scientific and social debate over the role of choice in determining whether a person is homosexual. Opinions began to form this week even before the study was publicly released.
August 10, 1990 |
A joint American-Soviet expedition using a Soviet mini-submarine has uncovered "a living laboratory of evolution" around hot water vents at the bottom of Siberia's Lake Baikal, providing scientists with an unusual opportunity to study organisms found nowhere else on Earth. Biological communities around deep-water hot vents have frequently been found in oceans but never in fresh water. The discovery was announced Thursday by the National Geographic Society, which co-sponsored the expedition.