Daily briefing: Ancient rise in CO<sub>2</sub> hints at what could happen today

Nature, Published online: 14 August 2026; doi:10.1038/d41586-026-02581-7A sharp rise in carbon dioxide around 56 million years ago was catastrophic for forests. Plus, mRNA-based flu vaccines have been approved in the United States and Anthropic is to introduce an AI watermark.

SINSIN
Aug 17, 2026 - 22:00
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Daily briefing: Ancient rise in CO<sub>2</sub> hints at what could happen today

Nature, Published online: 14 August 2026; doi:10.1038/d41586-026-02581-7A sharp rise in carbon dioxide around 56 million years ago was catastrophic for forests. Plus, mRNA-based flu vaccines have been approved in the United States and Anthropic is to introduce an AI watermark.

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