Covering two-thirds of the planet, the sea is a workplace for more than 50 million people. The oceans produce half the air we breathe, and more than 80 percent of the products we consume traverse the oceans. Aside from being vital, the oceans are also distinctly fascinating for the universality...

When a ship inadvertently spills oil, it’s big news. But every three years, ships intentionally dump more oil than the Exxon Valdez, and BP spills combined. This episode highlights a vexing and woefully under-discussed problem. It is made possible by corrupt ship captains who use a so-called...

The oceans are running out of fish. To slow down that problem, environmentalists pushed for fish farming or aquaculture. The problem is this industry became too big and too hungry. To fatten the farmed fish faster, they started feeding the high-protein pellets called fishmeal — made from massive...