We are a planet of ocean, not just a planet of land
In short: While we often view Earth as a terrestrial world, rotating our perspective reveals a different reality. The deep sea represents the vast majority of our planet's surface, yet it remains one of the final frontiers of human knowledge, guarded by extreme depths and darkness.
The ocean covers approximately three-quarters of the Earth's surface, with an average depth of roughly 3,000 meters. When viewed from a different orientation, it becomes clear that we inhabit a 'planet Ocean.' Of this vast marine expanse, about 90% is classified as the deep sea, the area extending beyond the continental shelf.
The history of our understanding of this biome began in earnest 150 years ago. In 1872, the British naval vessel Challenger set sail from Portsmouth for a four-year voyage. This expedition was pivotal in debunking the 'Azoic Theory,' a belief popularized by Forbes that the deep ocean was completely inhospitable to life. By visiting 362 stations and using dredges at 133 of them, the Challenger expedition described over 4,000 new species, effectively ending the theory that persisted for over two decades.
Despite this foundational work, significant gaps in our knowledge remain. These gaps hinder our ability to manage the deep-sea system sustainably. The next decade is expected to usher in a new age of deep-sea science, driven by a technological leap that includes manned submersibles, satellite measurements, acoustic systems, and artificial intelligence.
This progression from manual depth soundings to AI-driven research highlights a shift in how we interact with the unknown. We are moving from merely identifying life to understanding the complex mechanisms of a vast, largely unexplored system that defines our world.
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Sources
- Summary by Intellect · source: Exploring the Deep Sea
- Also: Exploring the Deep Sea
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