Far out in the Atlantic, Bermuda rises from the ocean floor with no obvious reason to be there. It is not perched on a spreading ridge, nor does it sit above a classic deep mantle plume like Hawaii.

Many people in the Faroe Islands, a tiny archipelago in the North Atlantic, want to be their own state. The crisis over Greenland, Denmark’s other territory, has complicated that, for now.

Sharks and rays in the Western Indian Ocean are facing an extinction crisis. Almost half of the region’s 270 known species ...

The comments came as the British government has moved forward with a deal to cede sovereignty of Diego Garcia to Mauritius.