Back to the Present

It's here, folks: today is the day we officially enter "the future", at least according to a certain wildly-popular 1980s film trilogy. The movies in question are much-beloved here at PhysicsCentral, so after ascertaining that today is in fact Marty McFly's "destination date" in "Back to the Future Part II", it seemed a special tribute post was in order. (We had to double-check, because there's a blog that's been churning out photoshopped screen captures claiming that "today's the day!" every...