The years 2025 and early 2026 have been transformative for microbiology, with major breakthroughs in environmental science and medicine driven by bacteria and archaea.
- Plastic-Eating Bacteria (Nov 2025): A global study led by KAUST confirmed that 80% of ocean samples now contain bacteria equipped with a specific enzyme signature—the M5 motif. This genetic adaptation allows marine microbes to digest PET plastic (used in bottles) efficiently, signaling a planetary-scale evolutionary response to human pollution.
- “AUN” Cancer Therapy (Aug 2025): Researchers in Japan successfully tested a “living drug” called AUN, a consortium of Proteus mirabilis and Rhodopseudomonas palustris. This bacterial duo works in harmony to invade tumors and trigger necrosis without relying on the patient’s immune system, offering a breakthrough for immunocompromised cancer patients.
- Archaea vs. Bacteria (Aug 2025): A study in PLOS Biology revealed that many Archaea produce “peptidoglycan hydrolases”—enzymes designed to rupture bacterial cell walls. This discovery identifies Archaea as a largely untapped reservoir for new antibiotics to fight drug-resistant superbugs.
- Asgard Archaea Revealed (April 2025): For the first time, scientists captured high-resolution microscopy of Asgard archaea (the closest relatives to eukaryotes). The images revealed complex, tentacle-like structures and a large cell size ($3 \mu m$), physically bridging the evolutionary gap between simple microbes and complex life.
