A to Z Health Guide 2007

The scientific bulletin of the year may be the stem-cell breakthrough. But 2007 provided a whole alphabet of big medical news. TIME's A-to-Z guide reviews them

By Coco Masters, Alice Park, Carolyn Sayre, Tiffany Sharples, Alexandra Silver and Kate Stinchfield

Baby Einstein

NIAMH BALDOCK / ALAMY
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The skill-building claims of DVD programs like Brainy Baby and Baby Einstein are plain from their titles, but the products may not be delivering. University of Washington researchers found that infants who watched programs with rapidly moving images accompanied by music — common in the videos — learned six to eight fewer words than other babies their age. Language skills are best learned, say experts, when babies interact directly with speakers.

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