What if every human could live underwater?

Imagine a world where the vast, unexplored depths of our oceans become our new frontier. What if humans could breathe underwater, withstand crushing pressures, and thrive in the darkness of the deep sea? Picture bustling underwater cities, bioluminescent gardens, and high-speed transit systems connecting continental shelves. How would this revolutionary adaptation reshape our society, economy, and relationship with the planet? From unparalleled scientific discoveries to radical shifts in geopolitics, the possibilities are as boundless as the oceans themselves. Join us as we dive into this fascinating hypothetical scenario and explore the profound implications of a truly amphibious human race.