Graffiti removal: the act of removing tags and graffiti by painting over them. Subconscious art: a product of artistic merit that was created without conscious artistic intentions. It is no coincidence that funding for "anti-graffiti" campaigns often outweighs funding for the arts. Graffiti removal has subverted the common obstacles blocking creative expression and become one of the more intriguing and important art movements of our time.

虽然太空和军备竞赛是冷战时期的常识，但很少有人知道美国和苏联在这场竞赛中挖得最深的洞。这尤其令人惊讶，因为地狱可能是在这个过程中无意中被发现的。