Descend with us into the shadowy abyss of Earth's oceans, where sunlight never reaches but life flourishes in ways once thought impossible. In this episode of The Deep Dive, we journey to the otherworldly landscapes of hydrothermal vents and cold seeps — ecosystems fueled not by the sun, but by chemosynthesis. Discovered in 1977, these deep-sea hotspots host spectacular, alien-like creatures: giant tubeworms, rare molluscs, and ghostly fish, each uniquely adapted to their high-pressure, chemically rich world.

At the heart of these ecosystems lies a delicate balance of symbiosis between microbes and the species that depend on them — many of which exist nowhere else on Earth. But this fragile web now faces an existential threat. As global interest in deep-sea mining surges, so too does the risk of irreversible damage to these  ...