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Black holes have become fixtures in science fiction. They’re potent symbols of mystery in part because we know so little about them.

Which students do school vouchers work for? And who do they leave behind?

Researchers at the Mayo Clinic evaluated about 90,000 messages between doctors and their patients and found differences in patients' responses based on the doctor's gender and area of practice.

The Ethiopian government said it will investigate a report of killings of hundreds its nationals at the Yemen-Saudi border. A Saudi government official rejected the Human Rights Watch report.

President Bush's emergency stimulus package proposes to put cash in the hands of consumers. Most observers expect that relief to take the form of tax rebate checks. But it's not yet clear how much the checks will be for, or who will qualify for them.

As summer wraps up, we look back on the books that defined the season.

Liberal Sen. Bernie Sanders and conservative Sen. Rand Paul used a hearing on emergency room use to engage in an unusual debate about whether health care is a right.

Students may have to wait even longer for their financial aid award letters due to an Education Department error

The Tiny Desk blooms with the stanzas, sounds and legacy of jazz poetry.

Eight people were shot including a young girl who was killed in what Chicago police believe was gang-related violence on the city's South Side on Saturday night.