Pristine Dust: The 20-Nanometer Time Machine Inside Asteroid Bennu

This episode explores the groundbreaking analysis of a microscopic, 4.5-billion-year-old asteroid fragment from Bennu, collected by NASA's OSIRIS-REx mission. Listeners will learn how researchers utilized advanced nanoscale techniques to map its chemical composition with unprecedented resolution, revealing its pristine, untouched architecture. The discussion emphasizes the critical "pristine advantage" of these samples, explaining why they offer a revolutionary, uncontaminated window into the early solar system's chemistry compared to altered meteorites.