Does more income equal more democracy? Not necessarily, according to an analysis of 200 years of international data.

The U-shaped happiness curve, widely accepted in industrialized nations, does not hold universally. Research by Michael ...

Glaciers erode U-shaped valleys with a flat floor and steep sides. The glacier uses the processes of plucking and abrasion to widen, steepen, deepen and smooth V-shaped river valleys into a 'U' shape.

Exercise is a powerful tool for managing cardiovascular health, but recent research highlights a nuanced relationship between physical activity and heart attack risk—a U-shaped curve.

A mind-blowing concept for the world's longest building has been revealed in the form of an incredibly cool, U-shaped skyscraper, and excuse us because we need a minute to take this all in.