Observatoire des droits humains (anglais seulement)

Earth’s oceans once turned green – and they could change again

(Version anglaise seulement)

par Cédric M. John, Professor and Head of Data Science for the Environment and Sustainability, Queen Mary University of London

Nearly three fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese researchers have made a compelling case that Earth’s oceans were once green, in a study published in Nature.

The reason Earth’s oceans may have looked different in the ancient past is to do with their chemistry and the evolution of photosynthesis. As a geology undergraduate student, I…

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