The typical human digestive tract is home to one of the densest communities of microorganisms on the planet. Bacteria dominate researchers’ attention, with the roles of other members of this ecosystem ...

Protists, eukaryotic unicellular organisms, play a crucial role in aquatic microbial food webs. Phagotrophic protists or ...

Recent advances have increased the number of bacteria, protists, fungi, and insects are known to science, making it difficult to count the total number of species on Earth.