Microbiology

🔬Blue-Green Algae

Cyanobacteria

Photosynthetic bacteria that produce oxygen. They created Earth's oxygen atmosphere billions of years ago.

💡Prochlorococcus is the most abundant photosynthetic organism on Earth — it produces 20% of our oxygen.

4 microbes

Can you guess microbes from their family tree?

GuessKin Microbiology is a daily taxonomy puzzle — Wordle meets the tree of life.