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 ...

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

Earth's oceans could one day turn purple. Nearly three fourths of Earth is covered by oceans, making the planet look like a ...

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

Earth’s oceans once looked green—and could turn purple or red due to climate and volcanic changes. Find out what it means for ...

But while lifeless during that time, the planet was already covered by vast oceans dotted with hydrothermal vent systems that released large amounts of ferrous iron into the water. The earliest ...

The reason Earth’s oceans may have looked different in the ancient past is to do with their chemistry and the evolution of photosynthesis ...

That our planet could be the only planet to host life ... This period coincided with the Earth's late Hadean and early Archean eons. Since this is when life appeared on Earth, it's firmly within ...