Bacteria are among the smallest living things. A single bacterium consists of just one cell. Not all bacteria are harmful. There are different unicellular organisms and types of bacteria.

Bacteria are among the smallest living things. A single bacterium consists of just one cell. Not all bacteria are harmful. There are different unicellular organisms and types of bacteria.

“We were inspired by the way bacteria propel ... shape after a time) or P-type (where shape-change is controlled in both directions by exposure to light of different wavelengths).