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The Netflix streaming service is presenting the first season of its newest collaboration with the Marvel comics group. It's called The Defenders and it's a small-screen teaming of superheroes that has been part of Netflix's programming plans since 2015.

Fresh Air tech contributor Alexis Madrigal counted 76,897 microgenres on the online streaming and DVD rental service, many of which are bizarrely personalized (Violent Action Thrillers Starring Bruce Willis, Tearjerkers From The 1970s). He says the company "knows you."