Earth’s oceans were green a billion years ago. They could soon be green again.

Earth’s oceans may have been green for billions of years

Earth’s First Oceans Were an Acidic Hellscape – Here’s What Happened Next

Bethany Theiling: Researching Oceans on Earth and Beyond

Whale poop contains iron that may have helped fertilize past oceans - EurekAlert

Whale poop contains iron that may have helped fertilize past oceans - EurekAlert

Sharks and rays benefit from global warming, but not from CO2 in the Oceans

Scientists Sound Alarm: Oceans Hit Record High Temperatures, Threatening Life on Land

As Oceans Warm, Predators Are Falling Out of Sync with Their Prey

NASA Unveils the Stunning Turquoise Phenomenon Transforming Patagonia’s Oceans

Could Habitable White Dwarf Planets Retain Their Oceans? Maybe.

Enough water to fill trillions of Earth's oceans found in deep space circling a quasar

2 populations of dark comets in the solar system could tell researchers where the Earth got its oceans

NASA’s New Discovery: Earth’s Oceans May Have Cosmic Origins

Humpback Whale Makes Record-Breaking Migration Across 3 Oceans

This whale made an epic trek across 3 oceans — possibly for the ladies

Early Earth's Oceans of Magma Accelerated the Moon's Departure

Whale breaks record, swimming across three oceans in search of new breeding ground

NASA Reveals Jupiter Comets May Have Brought Water to Earth | Scientists have revived the theory that short-period comets could have played a crucial role in filling Earth's oceans with water.

NASA-Led Team Links Comet Water to Earth’s Oceans