The forms of protists are as varied as they are ethereal, and all are invisible to the naked eye. For the past seven years, Kevin J. Carpenter has been researching and photographing some of these ...

Paramecium are ciliates, members of a phylum of protists that possess both germline and somatic genomes housed in functionally distinct nuclei — the micronucleus and macronucleus, respectively. During ...

The mixotrophic protist Paramecium bursaria can eat bacteria or use photosynthesis to get energy and carbon. Photosynthesis occurs inside the endosymbiotic Chlorella algae (green spheres) that live ...