Corrected entry: The episode is set in 2049. The lead astronaut mentions that her grandmother used to use the social media and blogging site Tumblr, in a fashion suggesting that the site is by this time a thing of the past, much like slide rules now. However, she is played by an actress who is at least in her late forties, meaning that if you do the math, her character would be more than old enough to have used Tumblr herself.
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