⚡Researchers analyzed 3.95-billion-year-old rocks from northern China to study early Earth history and tectonic activity.

What it means

Researchers have analyzed 3.95-billion-year-old rocks from northern China, among the oldest known on Earth, to study early planetary history. The paper, published in Nature, reports that these rocks contain chemical fingerprints indicating that surface-altered oceanic crust was rapidly buried to great depths, providing direct evidence that some form of plate tectonics or crustal recycling was already operating within the first 600 million years of Earth's existence.

Accuracy & sourcesGrounded

The claim is based directly on a peer-reviewed primary research paper in Nature (doi:10.1038/s41586-026-11280-2), which is the authoritative source. The reporting in the highlight and the grounding closely reflect the paper's findings, and the search results confirm the paper's publication and its core conclusions.

How new

Genuinely new; the paper was published on 11 November 2026, so this is current research.

Go deeper

• The Conversation (AU) — first to publish