May 21, 2005: Powered By Blood

But not in the vampiric way. No, this one is good news.

Glucose is the "blood sugar" that gives you your energy. A Japanese team has now created a tiny glucose-burning fuel cell that contains no toxic substances and can be implanted in the body to power (for instance) a pacemaker. So you'll never have to change the batteries. Just keep eating. Read the IOL story.