Photo: Eighteen Numbered Black by Alexander Calder (mobile in SFMOMA) 2017 Jul 13Andrew M. CrusoeAuthor Life in Photos A fun Alexander Calder piece called Eighteen Numbered Black — perfectly balanced. Share SEE RELATED POSTS: Photo: Trail down to Black Sand Beach (Kalapana, Big Island, Hawaii) Photo: Unexpected Black Military Helicopter Photo: Orange & Black Koi Fish in the clear pond of Lan Su Chinese Garden