The art of trend-spotting is set to take a more scientific turn as Google Inc., the world's top Web search company, on Tuesday unveils a service to track the fastest-rising search queries. Google Hot Trends combines elements of Zeitgeist and Trends -- two existing Google products that give a glimpse into Web search habits, but only in retrospect based on weeks-old data. Hot Trends, a list of the current top-100 fastest-rising search trends, will be refreshed several times daily, using data from millions of Google Web searches conducted up to an hour before each update, the company said. What's hot and what's not will be knowable to the masses in ways pioneering social philosophers could never have imagined.

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