Joining the dots: Mathematicians solve hot coloring problem

Have you ever tried to do a brainteaser in which you have to connect the dots to make the outline of a house in one continuous stroke without going back over your lines? Or perhaps you've clicked on Facebook's friend recommendations ...

New study finds tweets can amplify, disrupt, unite and divide

Social media connects people and amplifies different aspects of humanity in good and bad ways. But the effects of social media appear neither universally good nor bad, but rather present an oscillating, dynamic system that ...

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