billionaire media tycoon and mayor of san francisco. vp @foundersfund. ringleader @hereticon. editor-in-chief @ pirate wires 
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What physical embodiments of portals between worlds have been imagined in sci-fi/fantasy? My starter list: Rabbit hole (Alice) Subtle knife (dark materials) Wardrobe (Narnia) Phone booth (Doctor Who) Platform 9 3/4 (Potter) Wormhole with gate (Stargate)
