Trapped gases in ancient rocks challenge global explanation for 2-billion-year-old carbon anomaly

PHYSorg
Aug 10, 2026, 12:40 pm263 ptsTop
Roughly 2.5–2 billion years ago, Earth's surface experienced the biggest chemical change in its history when oxygen became abundant in the atmosphere, eventually leading to the evolution of complex life forms such as plants and animals that emerged half a billion years ago.

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