One problem that scientists have been trying to tackle for some time is how to search non-text data on the Internet. Traditionally, that has been done by looking at meta-data (ex: tags) or by trying to divine meaning through filenames or the context of the HTML page.
However, a new web application called Podzinger allows you to search within audio and video by doing audio recognition. I especially like it because it comes from BBN, which practically invented the Internet in the late 1960's when they created the first network: DARPANet.
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