3-D printing builds bacterial metropolises
Technique may help researchers study antibiotic resistance
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2013/10/mr_pnas.201309729_feat_FREE.jpg?fit=860%2C460&ssl=1)
CAGED IN Colonies of bacteria (green) nestle inside 3-D printed gelatin shells (red) in this computer-assisted 3-D microscopy image. Researchers can use 3-D printing to simulate social interactions between microorganisms.
J.L. CONNELL ET AL/ PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES 2013