3D printing and autonomous cars are two of today's hottest emerging technologies -- so why not combine the two? That's the idea behind Local Motors' latest vehicle, which features a 3D-printed body, a windshield video screen and no steering wheel. Meanwhile, OX launched the world's first all-terrain flat-pack truck, which can be quickly shipped anywhere in the world. Cannae Corporation announced plans to test an "impossible" zero-exhaust microwave thruster that could revolutionize space travel. And Electra Meccanica launched SOLO, an affordable three-wheeled electric vehicle for one.