posidonia oceanica

It turns out that the Earth is still breathing with larger lungs in the ocean, an ecosystem few of us know about: The seagrass fields.

The circles are shaped like bright oval ovals in the Mediterranean and Baltic seabeds, which are the result of non-vegetated bare patches of land between the seagrass fields.

Sophie Arnaud-Haond, a scientist from the French Research Institute, and her colleagues sampled from 40 seagrass beds Posidonia oceanica on an area up to 3,500km long. They found