From New Scientist:
Glowing bacteria that flash on and off together are pointing the way towards implants made of engineered cells that would deliver precise doses of drugs or hormones at specific times of the day.
The bacteria have been engineered to fluoresce in synchronised bursts to produce waves of luminescence – but the researchers were not after a biological light show. The feat is proof in principle that the activity of cells can be artificially coordinated, so that they no longer work in isolation.
What’s wrong with a biological light show? I think it would be interesting!