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 ...

The changes in ocean chemistry were gradual. The Archaean period lasted 1.5 billion years. This is more than half of Earth’s ...

THE Earth’s ocean could one day turn purple – and scientists say it used to be a totally different colour. When observed from ...

The recent paper's case for green oceans in the Archaean eon starts with an observation: waters around the Japanese volcanic ...

A new study suggests Earth's oceans may have been green during the Archean eon, around 3.8 to 1.8 billion years ago. The ...

From outer space observatories, one sees Earth’s oceans showing a blue appearance, but this color has never been permanent over their existence. Multiple types of evidence from the past and present ...

This points to high levels of iron in the ocean. Photosynthetic organisms use pigments (mostly chlorophyll) in their cells to transform CO₂ into sugars using the energy of the sun. Chlorophyll gives ...