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A big study suggests that radiologists vary widely in their assessment of density, a risk factor for breast cancer. And density is just one component of breast cancer risk, the researchers underscore.

One athlete's "psych-up" ritual may psych out an opponent. And even treatments that lack hard evidence of benefit, scientists say, might provide a competitive edge if the athletes believe they work.

The closures by Macedonia, Slovenia and other countries have effectively cut off the main migrant route to northern Europe. That's drawing criticism from rights advocates and Germany's Angela Merkel.

People in their 70s and 80s recovered more quickly from physical setbacks if they remained active, a study finds. Walking a total of 150 minutes a week with some strength training did the trick.

With cameras and smartphones, volunteers in Tanzania are snapping pictures as they cruise the dirt roads of Dar es Salaam, one of Africa's fastest-growing cities.

The White House said on Friday that FEMA will award two grants to help rebuild Puerto Rico's electrical grid system and education infrastructure after 2017's Hurricane Maria.

There is at least one bright spot to 2020: More residents across Ohio, Indiana and Kentucky have the opportunity to drop off broken or unwanted holiday...

Over the weekend an angry mob attacked Venezuelan migrant camps in a Brazilian town near the border. Ecuador has declared a state of emergency, and closed its borders to those without passports.

The eastern Congolese city of Goma is grappling with Ebola. Antiseptic washes, thermometers and road blocks are in place. But Congolese say they have far bigger things to worry about then infection.

The boat captain detained in Italy after she defied authorities and docked a boat carrying 40 migrants acted in accordance with the law, says the German humanitarian group sponsoring the ship.