Halley's Comet, Zircon Time Capsules and Jupiter: Tracing Earth's Water Origins

What if our water is older than Earth itself? Follow the clues from Halley's Comet to a 4.4 billion-year-old zircon that rewrites our planet's origin story. Naked Science tracks a forensic quest across space and deep time: the Giotto mission dives through Halley's tail, only to reveal a surprising hydrogen fingerprint that challenges the comet-delivery theory. Geologists crack open Earth’s past with the oldest zircon ever found, pointing to liquid water far earlier than expected. Mathematician Alessandro Morbidelli’s solar system model shows Jupiter’s gravity mixing wet mini-planets inward, while carbonaceous chondrites in the asteroid belt carry Earth-matching water. But could water survive the Moon-forming impact? See how a molten Earth acts like a sponge, and why a dry Moon makes sense. Finally, journey to Hawaii’s hotspot, where scientists hunt for primordial water locked deep in the mantle and compare it with Iceland’s. This episode stitches hard evidence, bold models, and stunning twists into a single chase for the truth about our oceans. Watch to discover how multiple sources may have filled a blue world—and what it means for finding other Earths. #NakedScience #EarthsWater #Comets #Asteroids #Zircon #Jupiter #MoonImpact