Veritasium peels back the math of six degrees of separation by exploring Duncan Watts’s small-world model, the strength of weak ties, disease-spread dynamics, and the role of network hubs through Barabási’s preferential attachment. Interactive simulations show how shortcuts and viral tipping points let information—or infections—zip across the globe in just a handful of steps.
Along the way, Derek Muller weaves in stories from Steve Strogatz and Mark Buchanan, points you to online tools, further reading, and even a Snatoms molecular kit, and gives props to sponsors (Incogni) and an all-star research and production crew for making it all happen.
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