Twitter is great for real-time news and updates, but searching through your history for tweets on a specific topic — that's much less efficient, even with hashtags. With more than 450 million tweets created every day, finding one from, say, 2007 may be harder (and more painful) than finding a piece of hay in a stack of needles. Topsy, a San Francisco-based social-analytics company, aims to change that. Topsy is one of a small handful of companies that offer advanced Twitter search tools for the microblogging network's entire stream, known as the Twitter "firehose." On Wednesday, Topsy took it a step further by opening up an archive of Twitter's entire history to the public — more than 425 billion tweets, videos, images, blog posts and location pins dating back to founder Jack Dorsey's first tweet in 2006, Topsy CEO Duncan Greatwood said in a release. Topsy's archive previously dated back to 2010, when it first partnered with Twitter. The r
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