Europe's largest car show has long been a source for fantastic debuts. This year marked a trend reversal for many carmakers, as small-car companies like Mini and Peugeot introduced more comfortable models, while large-car makers scaled things down. Several breathtaking designs were also on display, like Lamborghini's futuristic $1.4-million carbon-fiber Reventon. But the mantra of the show was "fuel efficiency." From hybrid-diesel engines, to ultracompacts, to plug-ins that could power a house in a brownout, Frankfurt's carmakers had gas-sipping on the brain in 2007.
For a look at the newest and shiniest Europe has to offer, launch the slideshow here.

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The 6th annual Invention Awards are here, from an inflatable tourniquet to a better lobster trap to spring-loaded hocket skates. This issue is all about the celebration of invention.
Plus: Making synthetic biology breakthroughs in a garage, building a constantly-moving ping-pong table, and a ridiculously overpowered barbecue.