Use Your Own Blood to Power iPod?

Yes, you are tight! It is hard to imagine but according to researchers on piezoelectric nanowires, we can use our own blood to power small device such as iPod.

They can harvest energy by converting low-frequency vibrations, like simple body movements, the beating of the heart or movement of the wind, into electricity by using zinc oxide nanowires that conduct the electricity. The nanowires are piezoelectric — they generate an electric current when subjected to mechanical stress.

[LiveScience]