Most often one blue and one brown, but other combinations can be found. Aristotle was the first to describe this, famous was Anastasius the first, dubbed dikoros. Another was Goethe, and here I’ll leave ya.

I stand in the desert, ancient and grand, Built by human hands, yet I seem so planned. With a square base and sides that rise to a point, I’ve watched centuries pass at history’s joint.

A cousin of the mighty Rex, I weigh in smaller, but mayhap meaner. Steven Spielberg made a movie star of my siblings and me, do we star in your nightmares now? Little kids wear me on their jammies, but if they met me they’d run away screaming. Birds are now my closest kin, to them I bequeathed my feathers and skin.

I'm ordinary and unremarkable everywhere, except on the battlefield

Irving Stone paired it with agony in a biographical novel about Michelangelo. It is a drug you might find at a rave. What a devoted fan feels when their team wins the championship.