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A UCLA study shows for the first time how microscopic crystals form sound and gravity sensors inside the inner ear. Located at the ends of cilia - tiny cellular hairs in the ear that move and transmit signals - these crystals play an important role in detecting sound, maintaining balance and regulating movement. Dislodged ear crystals are to blame for the most common form of vertigo.

Reuters - Several hundred African anti-AIDS campaigners paraded giant puppets of U.S. President-elect Barack Obama and French President Nicolas Sarkozy Tuesday to demand that they deliver promised funds for plans to fight the disease.

Reuters - Anti-biotech forces turned out in Kansas on Tuesday to argue against a state plan that would limit how dairy products free from artificial hormones can be labeled.

Reuters - New limits are needed to ensure that the long hours logged by young doctors in training at hospitals do not leave them so exhausted that they make medical errors, a U.S. expert panel said on Tuesday.