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No matter how intelligent a robot might be, it’s nice knowing you can pull its plug to halt the anti-human insurrection. Whoops, not anymore. A new cohort of ’bots that make energy by gobbling organic matter could be the beginning of truly autonomous machines.

There hasn't been such a scare over the future of green since Soylent Green. But a DARPA-funded robot that forages for biomass will only consume plant matter, as opposed to dead bodies or wayward pets, its creators assure us.

The makers of the Energetically Autonomous Tactical Robot (EATR) have issued a statement saying that "this robot is strictly vegetarian," after news outlets ranging from Fox News to CNET pounced on the flesh-eating potential of the bot.

A DARPA-funded robot that refuels itself on wood, grass--even decaying biomatter--whatever it can consume has met its perfect match--a biomass engine system called the Cyclone which we featured last year in our annual Invention Awards. Cyclone has just completed trials of their engine that will eventually digest EATR's foraged meals into power, just like Mr. Fusion.

Certain parts of a car´s engine can reach temperatures in excess of 1,500�F. With this in mind, the engineers at BMW developed a way to boost efficiency: Transform that otherwise wasted heat into energy the engine can use. The resulting Turbo- steamer reclaims more than 80 percent of the heat lost from the engine´s exhaust and cooling systems. It uses this surplus heat to generate steam that helps drive the engine. It boosts power and torque by 10 percent and cuts fuel consumption by 15 percent without using a single additional drop of gasoline.