Here's proof that green-design can be kick-butt cool. With four motorcycle batteries and a fuel tank from an F-4 jet, retired mechanic Robert Lange has made one sick dragster. Check out these electric wheels in action.; electric cars; design; green; diy rally; Pat Delany transformed two old car-engine blocks and a bunch of other castaway auto and machine parts into a mini machine shop.; Sander; multimachine; sheetmetal spinner; Lathe; grinder; diy rally; Popular Mechanics; horizontal mill; drill press; end mill; Nathan Moore spent 2 years and $15,000 to develop a hands-off, slow-cooking oven that can now be built for $4,000. ; cooking; bbq; diy; oven; automation; Michael Killian spent 10 days and $100 to build his sideways bike. Like a skateboard, the sideways bike positions the rider perpendicular to the direction of travel.; Popular Mechanics; transportation; bikes; sideways bike; diy rally; Two weekends and $78 resulted in a heavy-artillery version of a spud gun--and a neighborhood full of envious kids for engineer Bill LLewellin. ; Popular Mechanics; spud gun; diy; air gun; diy rally; David Southall took 8 days and $900 to build this monowheel based on a 1924 circus design. It works like a ball bearing--anchored by the weight of the engine and driver, the inner wheel stays upright while the outer loop, propelled by a 90cc engine r; auto; Popular Mechanics; monowheel; diy rally; David Hubbard converted a used 1986 BMW R80RT motorcycle into an eco-friendly touring bike whose fuel costs 65 centes a gallon--labor not included. Total materials cost was $8500.; motorcycles; green; diy rally; bmw; Popular Mechanics; biodiesel; Dodge Charger Police Package: Doing Donuts, Not Eating Them; Popular Mechanics; cars; Dodge Charger; California Governor Arnold Schwarzenegger embraces alternative fuel vehicles.; Popular Mechanics; LA Auto Show; Arnold Schwarzenegger; cars; California; We test drive Quantum Technologies' turbocharged hydrogen powered Prius.; LA Auto Show; Los Angeles Auto Show; fuel cells; cars; Popular Mechanics; Toyota; Ben Stewart interviews Nissan VP Larry Dominique about the new Nissan Sentra SER.; LA Auto Show; sentra; Los Angeles Auto Show; cars; Popular Mechanics; Nissan Sentra; nissan; Mazda unveils their Nagare concept car at the L.A. Auto Show.; Los Angeles; LA Auto Show; Los Angeles Auto Show; cars; mazda; Ben Chertoff interviews Jay Leno at the 2006 SEMA Show in Las Vegas at the unveiling of GM's new eco-friendly jet-powered supercar concept.; mid-engine; Jay Leno; cars; racing; Phoenix Motorcars and Altairnano displayed their 95-mph battery powered SUV at SEMA 2006. PM caught up with the builders.; Hybrid Vehicles; fuel cells; cars; We test three handheld cordless vacs to find which sucks the least -- and the most.; Popular Mechanics; testing; vacuums; PM takes a look at Sunbeam's new Rocket Grill.; Popular Mechanics; cooking; Six editors, one hatchet and a tank of liquid nitrogen. Let the pumpkin carving begin!; NASA tests the X-43A, a precursor to the X-51, a missile capable of travel at Mach 10.; X-51; NASA; missile; air force; War; The lastest videos from Popular Mechanics, covering new cars and trucks, technology, science, adventure, home improvement, how-to and news, straight from the editors, writers and sources.