Note: This episode contains strong language. Today, we’re sharing Episode 3 of “Rabbit Hole,” a New York Times audio series with the tech columnist Kevin Roose.In this episode, our reporter continues to trace the journey of a young man named Caleb. Five years into a rabbit hole on YouTube, Caleb discovers a parallel universe.If you're tuning in to "Rabbit Hole" for the first time, start with the prologue. For more information on today’s episode, visit <a href="http://nytimes.com/rabbithole" target="_blank">nytimes.com/rabbithole</a>.

The Sunday Read: 'Alone at Sea'

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