Bacteria Archaea Fungi Cyanobacteria Non-Bacterial Microorganisms Rotifers Bacterial Blooms Contamination Astrobiology Space Microbiology Bacillus subtilis Nematodes Viruses Extremophiles Food Spoilage Microbiome Tardigrades DNA Sequencing Ancient Microorganisms Treponemal Diseases E. coli Plastic-Degrading Bacteria Root Microorganisms Mold Biofilm Photosynthesis Single-Celled Organisms Symbiotic Relationships Yeast Space Biomarkers