A single-cell organism typically found in decaying vegetation in streams.

Scientists believe that a single-cell organism called an archaea trapped a bacterium one day.

Bizarre as it sounds, single-cell organisms and chemicals are already better than supercomputers at solving some problems.

But don’t be fooled by size—these microscopic, single-cell organisms are surprisingly hardy and exceedingly destructive.

In single-cell organisms like bacteria, the functional analogues of organs are called organelles.