Second Life is a free 3D virtual world where users can socialize, connect and create using free voice and text chat.
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http://www.sofi-kondor.de/media/Zauberbaum.mp3
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https://www.flickr.com/photos/ellenore56/
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https://www.ndr.de/kultur/musik/NDR-Chorexperiment-Der-Norden-singt-Dat-Du-min-Leevsten-buest-,chorexperiment194.html
http://deathclock.com/
https://www.youtube.com/watch?v=-PjaGQSsNlA
