Zealandia: The underwater eighth continent you didn’t know about November 24, 2025

A vast, mostly submerged landmass in the South Pacific, Zealandia, is now recognized as Earth's eighth continent. Recent mapping confirms its continental crust, scale, and ancient origins, challenging previous definitions. Once part of Gondwana, Zealandia thinned and sank due to tectonic forces, offering new insights into continental evolution and hazards.