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Inside Putin's Russia; Is China peaking?; Knowledge in the digital age

Fareed Zakaria GPS

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The Effects of Artificial Sweeteners on the Brain

Ads have been plastered around the New York City subway and people from Hollywood to the Hamptons are rumored to be using them Just to drop a few extra pounds. Their exact mechanism of action is not known They're believed to regulate blood sugar levels and imitate a hormone to signal to users brains that they feel full. Some scientists are now studying the possibility that these injections could quell more than just food cravings. But there is still a lot left to learn about how they work and what kind of long-term impact they may have.

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