The Purple Earth scenario encourages us to be visionary concerning the Earth’s past and the life prospects beyond Earth throughout the cosmos. We will find this color everywhere that organisms utilize ...

These surviving purple organisms may be living fossils from a time when Earth shimmered in violet hues. Retinal thrived in Earth’s oxygen-poor past, but chlorophyll changed everything.

Some scientists propose that Earth was once covered in shades of purple instead of green. The idea suggests early life forms used a different molecule for photosynthesis than today’s chlorophyll.

Also read: Unearthing Mars' watery past: NASA's Perseverance Rover reveals signs of ancient river flow The Evolution of Life on Earth: From Purple to Green Life on Earth provides valuable insights ...