The Most Extraordinary Icebergs

This episode explores how giant icebergs are formed when glaciers and ice shelves calve into the ocean, creating massive floating structures that can travel thousands of kilometers before melting away. It highlights famous examples such as A-68 and B-15, explains why most of an iceberg remains hidden beneath the surface, and examines how winds, currents, waves, and temperature shape their journeys. The episode also looks at their impact on navigation, marine ecosystems, ocean salinity, and climate science. Ultimately, it shows that icebergs are not simply frozen hazards, but dynamic parts of Earth’s climate and ocean systems, carrying ancient ice, nutrients, and environmental clues across the seas.