Bacteria are found living nearly everywhere on our planet, from the inside of human intestines to the soil to deep underwater. When scientists study bacteria in the lab, they most often examine individual bacterial cells as they grow rapidly in liquid cultures. However, bacteria in nature usually exist in the form of structures called biofilms—dense populations of cells attached to each other and to surfaces with a matrix of sticky goo.
Click here for original story, Deprived of oxygen, layers of bacteria get creative
Source: Phys.org