A new study indicated that regular daytime napping might be able to prevent brain shrinkage as we age. Previous research recommends napping between 10 to 30 minutes—and not more than an hour—to improve mood and cognitive performance. Longer naps can reduce sleep drive and they've been associated with an increased risk of heart problems and type 2 diabetes.
Armed with improved imaging techniques and supercomputers, researchers are generating detailed three-dimensional images of cellular structures that anyone can explore.
Open any introductory biology textbook, and you'll see a familiar diagram: A blobby-looking cell filled with brightly colored structures – the inner machinery that makes the cell tick.
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