Swirling photosynthesis factories. Cytoplasmic streaming inside plant cells ensures that every square micron of the surface of each little round chloroplast gets a chance to be warmed by the sunlight that powers its operations. Photons of light energy get captured and converted to chemical energy inside the chloroplasts. This is how plants and algae, and cyanobacteria enable life on Earth.
Magnified x40 and x100