die puny humans: the universe may be trumpet shaped.
The first thing I though when I saw this was... Hey, if you kind of folded it round a bit, and back on itself (mental process a bit like someone making a balloon dog goes on)... You'd get a Klein Bottle.
That's the kind of universe I want to live in.
Oh, by the way, I'm engaged. And, fingers crossed, by the date we've set to marry, we'll be able to 'marry' legally. Woot!