If you saw it, did you get the joke? They included it!
Ok, here it is:
So whenever you mention the History Channel, the image that springs to everyone’s mind (not without justification) is that if you ever flip past that channel, there’s something on about World War Two, with images of tanks and German soldiers, and Hitler, and so forth. Right?
But since the History Channel has made this departure into programmes about the science of the universe, this won’t happen during those programmes… Right?
Well, Laura Verklan (writer/director of the show) and I were chatting about this image that the channel has, during a break between shooting my contributions to the “Cosmic Holes” episode. We were talking about how, if you could make a wormhole (and I explained the immense theoretical and practical difficulties in doing this) even in principle, then it is easy to see from simple consequences of Special or General Relativity, that you can make a wormhole into a time machine. You’d be able go in one end and come out the other end in the past, for example. All science fiction as far as we know now, of course, but an interesting possibility to consider and study on paper at least.
Well, it hit us: A time machine. Ah…! We saw the opportunity for a big on-screen wink at the History channel audience…
You see the joke, right? During the show, soon after the possibility of time machines is mentioned, in the voice-over leading up to a break, the program asks (I paraphrase) “Can humans use time machines to go back in time and change history?”, and then, yes, they run some images of German soldiers, Hitler, and so forth…
I’m sorry, but I can’t help it – I think that’s just hilarious…!