Green oceans on early Earth, shaped by iron, pushed microbes to evolve light-absorbing tools that worked in green light.

It’s hard to picture now, but Earth’s deep blue oceans were once green. According to a new study by Japanese researchers, ...

As per The Conversation, the sun will get brighter as it ages, which might turn our waters purple. Evidently, however, the ...

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 ...

But while lifeless during that time, the planet was already covered by vast oceans dotted with hydrothermal vent systems that ...