Science ❯ Chemistry

Isotopes

Deuterium Hydrogen Isotopes Carbon Isotopes Carbon-14 Hydrogen Heavy Water Sulphur Isotopes Isotopic Ratios Promethium-147 Potassium Isotopes Stable Isotopes Oxygen Isotopes Radioisotopes Deuterium-Hydrogen Ratio Nitrogen Isotopes Isotopic Analyses Diet Analysis Radioactive Isotopes Chemical Reactions Sulfur Isotopes Organic Chemistry Water Chemistry Medical Applications Zinc Isotopes Actinium-227 Magnesium Isotopes Copper Isotopes Geographical Fingerprint Elemental Composition Hydrogen Atoms Chemical Composition Lithium Isotopes

VLT Confirms Ancient, Non‑Solar Chemistry in Interstellar Comet 3I/ATLAS

New isotope measurements point to formation in the cold outer disk of an ancient low‑metallicity star, reshaping ideas about planetesimal diversity across the galaxy.

Webb Reveals 3I/ATLAS as an Ancient Comet Born in a Frigid, Metal‑Poor Environment

Interstellar Comet 3I/ATLAS Shows Ancient, Cold Origin in JWST and Ground Spectra

Interstellar Comet 3I/ATLAS Shows Extreme Heavy-Water Enrichment, Study Finds

Oklo Wins First NRC License and DOE Safety Sign-Off, Signaling Shift Toward Operations

Study Traces Moon-Maker Theia to the Inner Solar System

MIT Team Finds Potassium-40 Anomaly That Points to Surviving Proto‑Earth Mantle

FDA Blocks Indonesian Clove Shipment Over Cesium-137, Puts Two Exporters on Import Alert