Physics

• Physics · 8 October 2026

  A reanalysis of ten isotope systems points to Earth's inner Solar System origins

  Two ETH Zurich scientists reanalysed published meteorite data and found that lines fitted through inner-Solar-System meteorites predict Earth's rock in all ten isotope systems they checked, once the predictions are combined. No new samples were measured. The study leaves room for up to about 2% of Earth to have come from farther out, and the paper makes no claim about where the oceans came from. The water line came from the university's release.

  Pattern: Promising, close to EarlyInner-only origin: EarlyCap on Earth's mass: Early, close to Speculative