How much land, water, and other resources does our lifestyle require? And how can we adapt this lifestyle to stay within the limits of what the Earth can give? A new article tackles these questions.

With eight billion people, we use a lot of the Earth's resources in ways that are likely unsustainable. Klaus Hubacek, ...

Nenad Lukic's Puzzlip generates free online puzzles. It divides an uploaded image into a grid and randomly rotates the squares. Click the squares to rotate them. It's funny because the copy describes ...