2. A new–and unexpected–application for the Golden Ratio.
3. Putting Dothraki down on paper.
4. How to make the perfect sandcastle.
5. We have something in common with the French.
6. How we figured out that the galaxy is a spiral.
7. Fear the Morozov.
8. I want my hypersonic jet.
11. Yes, I do feel old.
12. Images of Iran.
14. Epictetus on freedom.