A promising crop of new migraine treatments could alleviate the suffering of millions of Americans. iStockphoto.com hide caption

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Contact with animals and dirty environments may be one reason farm kids are less likely to get allergies, researchers say. iStockphoto.com hide caption

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Some fear that with rising medical costs and an aging population, the country's nursing staff will be stretched too thin. iStockphoto.com hide caption

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Douglas Harlow Brown, 80, of East Lansing, Mich., watches birds inside a medical rehab facility. Brittney Lohmiller for NPR hide caption

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In a study, patients with Parkinson's disease, a progressive nervous-system disorder, had fewer falls after taking up Tai Chi. iStockphoto hide caption

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Plan B is available over the counter for people 17 and older. AP hide caption

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