Deep sea hydrothermal vents reveal a hidden world where life thrives without sunlight, forcing scientists to rethink how ecosystems can exist in extreme heat, pressure, and darkness. Nearly two kilometers beneath the Pacific Ocean, superheated fluids erupt from the seafloor at Endeavour, creating environments that challenge everything we thought we knew about life on Earth and how it survives.

Deep-sea hydrothermal vents are not isolated deep ocean curiosities, they actively influence the chemistry of the entire Pacific Ocean. In this episode, scientists explain how minerals and iron released at Endeavour can be traced thousands of kilometers across the ocean, fueling productivity far from the vents themselves and connecting deep ocean processes to surface ecosystems in surprising ways.

Ocean Networks Canada enables this discovery through one of only two cabled deep-sea observatories in the world, allowing scientists to monitor volcanic activity, chemistry, and biodiversity in real time. This episode explores why Endeavour is one of the most important natural laboratories on the planet, what it teaches us about the origins of life, and how it may even help us understand life beyond Earth.

Surprising insight: the fluids released at Endeavour do not disappear into the ocean, they can be chemically traced across the entire Pacific, meaning deep-sea activity shapes ocean life on a planetary scale.

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