When Earth Was a Pale Green Dot
a year ago
- #Climate Change
- #Earth Science
- #Cyanobacteria
- Earth appears blue due to water reflecting blue wavelengths of light.
- During the Archaean Eon, oceans were green, possibly aiding cyanobacteria growth.
- Cyanobacteria triggered the Great Oxygenation Event, changing Earth's atmosphere.
- Iron hydroxide in ancient oceans scattered green light, influencing cyanobacteria evolution.
- Cyanobacteria developed phycobilins to harness green light for energy.
- Modern environments like iron-rich lakes mimic Archaean conditions.
- Climate change may be causing tropical oceans to turn greener.
- Green oceans could indicate early life on distant planets.