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Massachusetts Sen. Ted Kennedy has been diagnosed with a malignant glioma, a type of brain cancer. Dr. Andrew Norden of the Dana-Farber Cancer Institute in Boston talks about the treatment and prognosis of malignant gliomas.

Turns out wireless networks aren't wireless at all. And light pulses in fiber optic cables carry your voice around the world. A new exhibition explains the science you hold in your hand every day.

In New Orleans, there is a sense of relief that Hurricane Gustav didn't roar ashore as hard as it could have. The city avoided a direct hit, and its improved levee system has held.

U.S. Secretary of State Colin Powell's speech to the United Nations Security Council in February 2003 came to define and undermine the Iraq War.

The joke used to be that some women went to college to get their M.R.S. — that is, a husband. But a study by the Pew Research Center finds that women today are more likely to marry men who have lower education levels and lower income levels than they do.

News of Ted Stevens' indictment for allegedly failing to disclose services he received from a private company drew mixed reactions from his Senate colleagues. The Alaska senator, who faces seven felony counts, has allies on both sides of the aisle and has declared his innocence.

A Justice Department report finds that aides to former Attorney General Alberto Gonzales illegally discriminated against job applicants who weren't Republican or conservative loyalists. The report concludes that politics illegally influenced the hiring of career prosecutors and immigration judges.

As states brace for insurance market instability, some — like Maryland — take aggressive action.

After a war of words between President Trump and North Korea's Kim Jong Un over the ability to launch nuclear attacks from their desks, orders rose for pills to protect against radiation.

Food and Drug Commissioner Scott Gottlieb says he wants to know why drugmakers churn out medicines for some rare diseases but not others.