Chemical changes inside Mars's core caused it to lose its magnetic field. This, in turn, caused it to lose its oceans. But how?
Mau used traditional skills to guide a canoe from Hawaiʻi to Tahiti, sharing his navigational knowledge with others to keep the wayfinding traditions alive.
The days of celebrity oceanographers romancing the deep are gone, and maybe that’s a good thing.
Some countries argue that they should keep their ocean territories, even if the land they're based on is submerged.