The web has a problem: huge chunks of it keep going offline. The web isn’t static, parts of it sometimes just… vanish.

But it’s not all grim. The Internet Archive has a massive mission to identify and back up our online world into a vast digital library. In 2001, it launched the Wayback Machine, an interface that lets anyone call up snapshots of sites and look at how they used to be and what they used to say at a given moment in time. Mark Graham, director of the Wayback Machine, joins Decoder this week to explain both why and how the organization tries to keep the web from disappearing.

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Decoder is a production of The Verge and part of the Vox Media Podcast Network.

Our producers are Kate Cox and Nick Statt. Our editor is Callie Wright. Our supervising producer is Liam James.

The Decoder music is by Breakmaster Cylinder.

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