Hundreds of millions of years ago, Earth’s first forests helped pump oxygen into the deep seas, transforming once-barren waters into thriving habitats. This permanent oxygen boost allowed fish with jaws and other marine animals to expand, diversify, and grow larger, sparking a revolution in ocean life. Colonizing the Deep Seas Around 390 million years ago, […]



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Around 390 million years ago, Earth’s early forests played a crucial role in oxygenating the deep seas. Previously barren, these waters became habitable, fostering the evolution and diversification of marine life. This influx of oxygen allowed fish with jaws and various other marine animals to flourish. This transformative event triggered a revolution in ocean ecosystems, enabling marine organisms to grow larger and colonize the deep seas, fundamentally changing the structure and complexity of marine life as we know it.

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