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Spotify went down after it had forgotten to renew a TLS certificate

One engineer noticed Spotify went down this morning shortly after a security certificate expired, but started working again once it was renewed. A good reminder to set calendar notifications?

Martin Cooper with his original DynaTAC cell phone.

Photo: Ted Soqui/Getty Images

Martin Cooper helped invent one of the most consequential and successful products in history: the cell phone. And almost five decades after he made the first public cell phone call, on a 2-pound brick of a device called the DynaTAC, he's written a book about his career called "Cutting the Cord: The Cell Phone has Transformed Humanity." In it he tells the story of the cell phone's invention, and looks at how it has changed the world and will continue to do so.

Cooper came on the Source Code Podcast to talk about his time at Motorola, the process of designing the first-ever cell phone, whether today's tech giants are monopolies, and why he's bullish on the future of AI.

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David Pierce

David Pierce ( @pierce) is Protocol's editor at large. Prior to joining Protocol, he was a columnist at The Wall Street Journal, a senior writer with Wired, and deputy editor at The Verge. He owns all the phones.

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