Weird Revolving Doors Like These Could Save Your Life Someday

Doors are some seriously ancient tech but they have this problem where they can only keep people out if they're closed. This bizarre but clever take on the "revolving door" by a company called Barbecan, on the other hand, aims to get you inside, but simultaenously keep any ne'er-do-wells out. Specifically ne'er-do-wells with bombs and guns. More