What is design? What makes it distinct from art, science, or engineering? The editors of this site decide dozens of times a day what is or isn’t “design.” But is it ultimately subjective, or can it be ...

After two decades of fascination, imitation and debate, an international team of longevity scientists says it has reached a formal scientific definition for a “blue zones” region — establishing a ...

The International Astronomical Union defines a planet as a celestial body that orbits the sun, is massive enough that gravity has forced it into a spherical shape, and has cleared away other objects ...