@talk72000,
Ok, here's the explaino -
http://www.boston.com/news/local/massachusetts/gallery/100308_mit_hacks/?p1=News_links
"MIT's legacy as one of the world's most prestigious technical universities has a curious byproduct -- a history of clever pranks, or "hacks."
On Thursday, Cantabrigians noticed a strange sight atop an MIT building: A police call box reminiscent of the time machine used by science fiction hero Doctor Who.
This may be the most recent stunt by MIT's student body, but it's far from the first. Scroll through this gallery for a timeline of past MIT hacks."
(Bill Greene / Globe Staff)