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How Google's autonomous car navigates city streets

Google's self-driving car has been on the road for five years now, at various levels of autonomy. From the ease and relative serenity of California's arrow-straight highways, the car drove hundreds of thousands of miles with a greater level of concentration and mastery than the wandering attention spans of humans could accomplish. In 2012, Google shifted from the freeways to the cities, navigating a far more convoluted set of challenges: the slow-speed chaos that comes with any city, any suburb, any place with people and cars in it.

Porsche celebrates 2 million Facebook fans with museum car

Porsche hit 2 million friends on Facebook this week, and to celebrate, the company dedicated a car to all of them. The new Porsche Cayman S got a coat of white paint before each friend's profile picture was digitally added to the surface. They're all tinted in red, giving the car a candy-coated look, and the front-plate area reads "100% Porsche, 100% you." Fans also were asked to vote for their favorite historic racing livery.

Willie Nelson tour bus headed to auction in Toronto

Now here's a smokin' deal! One of country music singer Willie Nelson's tour buses is headed for the auction block next month. The 1986 Eagle Model 10 motor coach includes beds for six people, two lounge areas and hand-painted murals by the artist Rainmaker.