Caster Semenya and the Ambiguity in Determining Sex

The early morning hours of Nov. 17 will be the best time to view the Leonid meteor shower in the United States.

MIT 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.

A 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.

On 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.

Studies show Americans’ support for animal research has declined significantly. In response, biomedical researchers have launched a national campaign to defend and promote animal testing.

Mounting evidence suggests that the differences between male and female brain structure may be more heavily influenced by environment than previously thought.

Germ 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.

A 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.

In 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.

An 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.

Parents 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.

Early 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.

A 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.

The 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.

Everyone 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?

Based on the discovery of ancient coin hoards, two scientists believe the population of ancient Rome may have been smaller than previously suggested, an issue that is widely debated.

Tonight, NOVA will broadcast “Darwin’s Darkest Hour,” a docudrama that examines Charles Darwin’s struggle over whether to publish his theory of evolution, knowing it would anger the church and threaten his marriage.

Gain a better understanding of the Nobel prize-winning discovery that will aid in the development of new cancer therapies.