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With growing controversy over the risk of permanent brain injury in contact sports, researchers find an association between repetitive head trauma and brain disease in samples taken from deceased athletes. Many were professional football players.

A few months ago health workers discovered a new variety of coronavirus that killed one man and hospitalized another. Now the virus has infected four more people in the Middle East. How they got sick is a question scientists would like to answer.

New research suggests older adults may have less activity in the area of the brain that processes risk and subtle danger. Another possible reason older adults don't pick up on warning signs is an increasing bias against negativity.

A large niacin-plus-simvistatin study by the drug maker Merck may have far-reaching implications, since millions of people take niacin every day to prevent heart attacks and strokes. One doctor says "phones will ring off the hook in cardiology practices throughout America" because of the news.

Three models of the infant recliners are being recalled voluntarily by some of the nation's biggest retailers, including Amazon.com and Buy Buy Baby. The Consumer Product Safety Commission claims the products are hazardous. The maker has said the infant seats are safe when used as directed.

While some cities push measures that drive immigrants away, some cities are doing exactly the opposite. Dayton, Ohio, adopted a plan to rebuild its battered economy by attracting immigrants — an approach that's influencing the way other cities deal with immigration.

The fall of Ramadi, Iraq, to self-declared Islamic State militants has highlighted possible shortcomings in the U.S. strategy to fight the Islamic State.

In Sgt. Bowe Bergdahl's hometown, a celebration had been planned for his homecoming. Now, facing new questions and controversy, the town of Hailey, Idaho, has cancelled that celebration. Jeff Gunter, chief of the Hailey Police Department, explains the decision.

Kentucky residents may have trouble getting into federal buildings with just their driver's license come July 21. The Real ID Act of 2005, signed by...

The House panel voted Thursday to advance a bill that would end the National Security Agency's bulk collection of Americans' phone records.