Anja Niedringhaus/AP
Caster Semenya celebrates after winning the women’s 800-meters, Aug. 19, 2009.
Caster Semenya celebrates after winning the women’s 800-meters, Aug. 19, 2009.
Caster Semenya and the Ambiguity in Determining Sex
November 19, 2009 08:00 PM
The results of Caster Semenya’s sex verification tests will not be made public. Reports suggest that she is intersex, meaning that she cannot be classified simply as a male or female.
More Science

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November 14, 2009 03:00 PMThe early morning hours of Nov. 17 will be the best time to view the Leonid meteor shower in the United States.
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November 11, 2009 07:30 AMMIT researchers have shown that the brain appears to react more to success than failure, supporting previous evidence that we learn more from a positive outcome than a negative one.
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November 10, 2009 11:30 AMA recent study found that intense prayer and meditation have a positive effect on mental ability, leading one researcher to suggest that it’s possible to reconcile science and religion.


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November 08, 2009 02:00 AMOn Nov. 8, 1895, German scientist Wilhelm Roentgen’s experiments with cathode rays led him to discover X-rays, a feat that earned him the first-ever Nobel Prize for Physics.
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November 06, 2009 06:00 PMStudies show Americans’ support for animal research has declined significantly. In response, biomedical researchers have launched a national campaign to defend and promote animal testing.
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November 06, 2009 05:00 PMMounting evidence suggests that the differences between male and female brain structure may be more heavily influenced by environment than previously thought.


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November 05, 2009 05:30 PMGerm cells, the cells that compose eggs and sperm, could provide insight into the earliest stages of human development, and maybe even prevent infertility, birth defects and genetic diseases.
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October 26, 2009 08:25 PMA Danish report on the level of contact that 2-year-old children in the developed world have with feminizing chemicals has been met with shock and concern by some, and frustration by those that say this is a new take on old news.
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October 19, 2009 07:30 PMIn many U.S. states, the DNA of those arrested but not convicted is held indefinitely. In Britain, however, the Home Office dropped a DNA database proposal due to strong public opposition and a European court ruling.


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October 14, 2009 07:00 AMAn Oxford University study has found that practicing a task such as juggling can alter the structure of the brain, indicating that the plasticity of the brain is greater than previously believed.
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October 14, 2009 04:00 AMParents who demand honesty from their children lie just as frequently as parents who don’t, report studies from the University of Toronto and the University of California, San Diego.
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October 09, 2009 07:30 PMEarly this morning, the Centaur rocket, followed by the LCROSS craft, collided with the moon in an attempt to stir up a plume of dust that scientists hope will reveal deposits of ice on the moon.


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October 09, 2009 08:00 AMA recent study suggests there may be a link between prenatal exposure to the chemical and increased aggression in little girls, but many find the association to be unfounded.
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October 08, 2009 03:00 PMThe number of microorganisms in Sydney Harbor tripled in the days following the dust storm. Phytoplankton is a key part of the ocean ecosystem, but too much of it can have dire consequences.
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October 07, 2009 05:30 PMEveryone has gene NRG1, but in many breast cancer cells the gene is “broken.” How will the newfound link between the gene and cancer change the future of medicine?




