New research shows ancient tropical oceans once held more oxygen than cooler regions, reshaping where early life could ...

Finding oxygen in an exoplanet’s atmosphere is a clue that life may be at work. On Earth, photosynthetic organisms absorb carbon dioxide, sunlight, and water and produce sugars and starches for energy ...

Research reveals when and why ancient tropical seas transitioned from oxygen oases to marine dead zones, providing clues to ...

Today’s climate change pales in comparison with what happened as Earth gave birth to its oxygen-containing atmosphere billions of years ago. By analyzing clues contained in rocks, scientists at the ...