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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.

San Francisco wants to give long-term residents of a historically African-American area preference in a lottery for new affordable units. Federal officials say that would violate fair housing laws.

After the Republican presidential candidate's son compared Syrian refugees to a bowl of poisoned Skittles, the candy's parent company responded, saying, "Skittles are candy. Refugees are people."

Republican presidential candidate Donald Trump appeared on the talk show of Dr. Mehmet Oz to discuss his health records.

Police are looking for Ahmad Khan Rahami, 28, who was born in Afghanistan. His last known address was in Elizabeth, N.J., where an explosive device was found near a train station overnight.

Weekend flooding forced more than 20,000 Louisiana residents from their homes and left at least six people dead. Many businesses and homes remain without power.

Clinics are using stem cells to treat problems ranging from arthritis and torn tendons to paralysis and stroke. But researchers say there's no evidence that the treatments work or are safe.

Earlier studies suggested that most people put the pounds back on, but a large study that followed people for a decade after bariatric surgery found that the vast majority avoided gaining weight.

It seems presidential candidate Donald Trump is once again off message. NPR Politics' editor Domenico Montanaro joins Rachel Martin for a look back at Trump and Hillary Clinton's weeks.

Justin Rose of Great Britain won the first Olympic gold medal in golf since 1904, after holding off Sweden's Henrik Stenson.