iceberg

NASA

Ailing “Megaberg” Sparks Surge of Microscopic Life

Iceberg A-23A has had a more eventful run than most of the large Antarctic icebergs that have calved from the continent’s ice shelves in recent decades. Over its winding, forty-plus-year journey, the “megaberg” spent decades grounded in the Weddell Sea before drifting north, twirling in an ocean vortex for months, and nearly colliding with an island in 2025. By 2026, the iconic iceberg, sopping with meltwater and shedding smaller…