Did Earth Once Boast Green Oceans?

Have you ever gazed at our beautiful blue planet from space and wondered what it looked like ages ago? Recent groundbreaking research from Japan is flipping the script on Earth's history, revealing that our oceans may not have always gleamed blue—but once radiated a striking green!

A dedicated team led by Taro Matsuo at Nagoya University has uncovered revolutionary evidence that ancient oceans thrived with cyanobacteria, famously dubbed blue-green algae. These essential bacteria were pivotal in Earth’s evolutionary story, and their existence flourished in what were described as vibrant green seas. Matsuo, reflecting on his journey, exclaimed, "Initially, I was skeptical about theidea that oceans were green. However, years of research have transformed doubt into unwavering conviction."

A Green Glimpse of the Past