Researchers on Thursday challenged a tenet of modern medicine that higher levels of "good" cholesterol automatically boost cardiovascular health.

For the first time ever, white births in the United States are no longer in the majority, according to US Census Bureau estimates Thursday that underscored the growth of the Hispanic population.

A popular antibiotic used for treating bronchitis, pneumonia, ear infections and sexually transmitted diseases may boost the risk of death, a US study said Wednesday.