The first DVD videocamera, from Hitachi, was a bulky novelty. Three years later, however, we're happy to see svelte models from Panasonic and Sony (shown here) -- as well as a new trimmed-down model from Hitachi -- that will hit the shelves in the coming months. Why ditch your trusty MiniDV camcorder? Because you can take the 3-inch DVD-R disc ($2) out of these cams and pop it into just about any DVD player for viewing. Even better, they don't skimp on quality or recording time: You'll get 60 minutes on each DVD-R disc, or 120 minutes with a rewritable disc. Sony's model, the DCR-DVD200 (price not set) weighs only a pound and a half, and includes in-camera editing. Look for it this summer.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.