A web app that works out how many seconds ago something happened. How hard can coding that be? Tom Scott explains how time twists and turns like a twisty-turny thing. It's not to be trifled with! A Universe of Triangles: https://www.youtube.com/watch?v=KdyvizaygyY LZ Compression in Text: https://www.youtube.com/watch?v=goOa3DGezUA Characters, Symbols and the Unicode Miracle: https://www.youtube.com/watch?v=MijmeoH9LT4 More from Tom Scott: null and https://twitter.com/tomscott http://www.facebook.com/computerphile https://twitter.com/computer_phile 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