By Devin Powell
The first living laser is nothing to be afraid of. It’s just a single cell pulsing with light that may lead to new ways of probing microscopic realms.
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2011/06/14504.jpg?resize=300%2C234&ssl=1)
And maybe — just maybe — laser bunnies.
The secret to the cell’s splendor is called green fluorescent protein, or GFP, researchers report online June 12 in Nature Photonics.