Cryptographers have identified the first known secure global communication system, in the form of nineteenth century newspaper ads. Plus, a fourth patient has been effectively cured of HIV. And Netflix is retroactively editing Stranger Things. The edits are not as big a deal as they seem, but the fact that Netflix can implement them so easily raises bigger questions about the future of arts and entertainment. Sponsors:Kolide, Got Slack? Got Macs? Get Kolide: Device security that fixes challenging problems by messaging your users on Slack. Try Kolide Today! https://l.kolide.co/3aVdR90 Indeed, Get a free $75 credit PLUS earn up to $500 extra in sponsored job credits with Indeed’s Virtual Interviews at Indeed.com/goodnewsLinks:Codebreakers Find ‘Sexts,’ Arctic Dispatches in 200-Year-Old Encrypted Newspaper Ads (Vice)Fourth patient seemingly cured of HIV (BBC)Fourth person 'cured' of HIV, but is a less risky cure in sight? (Medical Xpress)Stranger Things Season 4: Duffer Brothers on Fixing Will's Birthday (Variety)Netflix retroactively editing Stranger Things is the beginning of a dangerous TV trend (GQ)Is Netflix’s ‘Stranger Things’ Editing Out Jonathan’s Creepy Behavior in Season 1? (The Mary Sue)Jackson Bird on TwitterSee Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.