The James Webb Space Telescope (JWST) has enabled astronomers to observe LAP1-B, the most chemically primitive galaxy identified to date, existing just 800 million years after the Big Bang during the Epoch of Reionization. This ultra-faint galaxy, characterized by an extremely low oxygen abundance (1/240th that of the Sun), provides crucial insights into the early stages of galaxy formation. Led by Associate Professor Kimihiko Nakajima of Kanazawa University, the research team utilized JWST's advanced infrared capabilities and gravitational lensing techniques to study LAP1-B's chemical composition. Their findings suggest that the galaxy's carbon-to-oxygen ratio aligns with theoretical models of material produced by the universe's first stars, known as Population III stars. The study also reveals that LAP1-B is remarkably light, indicating a substantial dark matter presence. This discovery not only aids in understanding the origins of heavy elements in the universe but also establishes a direct link to the ancient Ultra-Faint Dwarf galaxies found near the Milky Way. The team plans to continue their research to uncover even more primitive galaxies, further illuminating the universe's early history.