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Ornate refreshment kiosks were once the heart of Lisbon's parks and plazas. They faded away under a dictatorship that discouraged public gatherings. Now they're back to help revitalize the city.

Officials say they've found the first indication that mosquitoes are transmitting Zika virus in the U.S. Four people in South Florida are infected; travel or sexual transmission has been ruled out.

This weekend's top arts events include everything from (fake) blood and sequins to local art and post-punk.

Health officials put blood donations in South Florida on pause until it's known whether four cases of Zika virus were caused by mosquitoes in the U.S., or until blood donations can be screened.

Dolly, the first cloned mammal, had early arthritis and died young, raising concerns that clones age prematurely. But a study confirms the sheep's four sister clones are healthy and aging well.

A burned body was found near a northern Los Angeles brushfire that's forced the evacuation of 1,500 homes. As of Saturday night, the 31-square-mile fire was just 10 percent contained.

Hillary Clinton has chosen Tim Kaine as her running mate. Here are some fast facts about the Virginia senator.

The UC San Diego Student-Run Free Clinic Project has reached a financial milestone: Its medical students, who treat indigent patients across the city, have promised to donate $1 million to continue the clinic’s work.

One in 10 U.S. adults has tinnitus. Cognitive behavioral therapy is one of the few interventions that have been shown to help, but it's rarely prescribed by doctors, a study finds.

Research shows exercise-based cardiac rehab programs help heart patients heal faster and live longer. But fewer than a third take part. Time and cost are the main barriers, doctors and patients say.