Copenhagen

85% of Greenlanders oppose joining the U.S. — yet Washington and Copenhagen are about to sign a security deal about their island.

A "sidelines" meeting sounds casual. It's actually a fully scripted format with its own rules — and the Greenland signing shows why the label matters.

A few hundred people, four months of darkness, and a $100M-a-year mission on thawing permafrost.

From a $225 Rio-to-Lima marathon to a $24,000 guided expedition, the world's longest bus rides are a study in slow-travel misery.

Copper turns green, lime plaster hardens, concrete just stains. What if architects designed for year 100 instead of day one?