'Altered Carbon' Explainer: What the Heck Are 'Meths'?

(Note: This post contains light spoilers for the first three episodes of “Altered Carbon.”) The distant future of Netflix’s new sci-fi series “Altered Carbon” is full of weird and interesting concepts, and slang language to go with them. The primary concept that informs the show’s world is the “Stack,” a small computer inserted into people’s brains when they turn one year old, on which a person’s consciousness is installed like software. The result is that even if your body i...