Phantom City: App Provides Glimpse of Unbuilt NYC

A floating airport off Battery Park, a mile-high dome over Midtown Manhattan and a hulking Harlem in the sky… these structures may not actually exist in New York City, but tourists can still ...

Sound Mirrors: Before Radar, Hearing Was Believing

The invention of radar in the 1930s not only saved Great Britain from the German Luftwaffe, it gave the Allies a huge advantage over their enemies in World War II. Imagine where we'd be if radar ...