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 ...

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 ...

Who’d have thought such a tiny planet would stir up such a big controversy? Everyone seems to have an opinion on the recent vote by the International Astronomical Union to change the official ...