"Zealandia, an almost entirely submerged continental mass located in the southwestern Pacific Ocean, is often referred to as Earth's concealed continent because it satisfies numerous criteria used in defining continents, such as distinctive geology and a well-defined area. This region encompasses New Zealand and New Caledonia and serves as an ongoing focal point for scientific exploration. 1. **Size and Geography**: Zealandia spans approximately 4.9 million square kilometers (1.9 million square miles), with the majority submerged beneath the ocean surface. Only around 6-7% of its landmass, including New Zealand and New Caledonia, emerges above sea level. 2. **Geological Significance**: Comprising primarily continental crust, Zealandia distinguishes itself from the surrounding oceanic crust. It is believed to have once been part of the Gondwana supercontinent before separating from it approximately 85 million years ago. 3. **Formation**: Plate tectonics are responsible for Zeal...