In the 60’s, I remember an article about some NASA scientists invited to the stage to observe the bridge and give their thoughts.. They filled out a questionnaire and all the NASA guys agreed that in 200 years, Man would have space travel, phasers, warp speed, but not a one believed that we would have doors that open and close automatically!I'm thinking that has to be an urban legend. Automatic-opening doors were invented in the Fifties, and the first one was installed in 1960 - source. All the supermarkets in my hometown had them when I was a young kid (early 70s).