Whether its the Darwin Award nominees or simply another crazy cat, animated GIFs have a lot to answer for. They're also a perfect example of one of Computer Science's fundamental principles - Tom Scott explains.

More from Tom Scott: http://www.youtube.com/user/enyay and https://twitter.com/tomscott

How NOT to Store Passwords: http://youtu.be/8ZtInClXe1Q
LZ Text Compression: http://youtu.be/goOa3DGezUA

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This video was filmed and edited by Sean Riley.

Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels