Ever wondered why you’re only a few handshakes away from anyone? Derek Muller dives into the small-world magic of six degrees, showing how even a sprinkle of random links (aka weak ties) turns tight-knit groups into a global village—and how that also helps viruses (and viral videos) zip around the network.
Then he brings in Barabási’s preferential attachment to explain why certain people or papers become mega-hubs, spawning that famous long-tail curve. Along the way you get interactive simulations, book recs, and a fascinating peek at how network math shapes everything from disease outbreaks to the Prisoner’s Dilemma.
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