Science Alert
In a ghastly vision of a future cut off from sunlight, the machine overlords in the Matrix movie series turned to sleeping human bodies as sources of electricity. If they’d had sunlight, algae would undoubtedly have been the better choice.
Engineers from the University of Cambridge in the UK have run a microprocessor for more than six months using nothing more than the current generated by a common species of cyanobacteria. The method is intended to provide power for vast swarms of electronic devices.