Scientists have uncovered an unexpected witness to Earth’s distant past: tiny iron oxide stones called ooids. These mineral snowballs lock away traces of ancient carbon, revealing that oceans between 1,000 and 541 million years ago held far less organic carbon than previously thought. This discovery challenges long-standing theories linking carbon levels, oxygen surges, and the emergence of complex life.
source https://www.sciencedaily.com/releases/2025/09/250926035026.htm
Superheated sediments in a submarine pressure cooker—an unexpected source
of deep-sea hydrogen
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The mid-ocean ridge runs through the oceans like a suture. Where Earth's
plates move apart, new oceanic crust is continuously formed. This is often
accompa...
2 hours ago
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