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 ...

Ecology and artificial intelligence: Stronger together

Many of today's artificial intelligence systems loosely mimic the human brain. In a paper published in Proceedings of the National Academy of Sciences, researchers suggest that another branch of biology—ecology—could ...

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