Researchers largely agree that about half of Americans are probably not getting enough vitamin D from the places we've traditionally gotten it: food and sunlight. And that's a problem because vitamin D keeps calcium from leaking out of our bones; too little vitamin D can also be a factor in kidney disease and skeletal problems.
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For better or worse, Microsoft has now shown its hand. The company Thursday showed off its new operating system, Windows 8, which will either mark a new era for the software giant in a hyper-competitive market, or spell its downfall.