On the Frontier of Search

Get ready for a wave of new features--from 3-D satellite pics of your house to news tailored to your clickstream. A guide to innovative engines

You land late in the evening in a city where you know nobody. You did not have time to book a hotel, your luggage has not turned up on the carousel--and the plane's air conditioning gave you a sore throat. What to do?

With your cell phone, you first Google your suitcase--it has a small implanted chip that responds to radio waves with a GPS locator--and it turns out that your luggage has been deposited 200 yds. away in the next terminal. As you walk over, you search for a hotel room; the screen of your cell shows you pictures of several...

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