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Yes, the universe is expanding. But how fast?

Astronomers agree that the universe is growing larger, and that the rate of expansion—called the Hubble constant—is accelerating. What they don’t agree on is the best way to measure that expansion rate. Current methods have produced numbers that don’t align.…

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Social networks boost online voter registration

Americans will vote to elect a new president on Nov. 8, but first they must register to vote. On National Voter Registration Day in September, social media networks played a major role in helping remind people to register. Facebook placed notifications on the top of the users' newsfeeds. Snapchat had…

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