A total solar eclipse plunged Antarctica from summer into darkness early Saturday in a rare astronomical spectacle witnessed by a handful of scientists and thrill-seekers—and countless penguins.

America's winter wonderland is starting out this season as anything but traditional.

Chilean paleontologists on Wednesday presented their findings on a dinosaur discovered three years ago in Patagonia which they said had a highly unusual tail that has stumped researchers

A study of HIV-positive black and Latino men who have sex with men finds the use of methamphetamine combined with intimate partner violence boosted the activity of genes that regulate the body's inflammatory and antiviral functions. The combination may lead to exhaustion of the immune system in people living with HIV, increasing the risk for developing chronic diseases such as cardiovascular...

Business leaders and management experts often encourage people to speak up in the workplace. Suggesting a creative idea or a more efficient way to work can help companies overcome challenges and meet goals. But new research shows another, more subtle and often overlooked form of speaking up has a big effect on the way work gets done and how teams come together.