The Oxygen Revolution: How Cyanobacteria Changed Earth!
Did you know that Earth's atmosphere contains around 21% oxygen, but it wasn't always that way? Billions of years ago, Earth's atmosphere had almost no oxygen until photosynthetic organisms like cyanobacteria began producing it, dramatically changing the planet and paving the way for diverse life forms! 🌍🌿 #EarthFacts #OxygenRevolution