You heard it like me, someone just asked about the physics of Aperture Science's neat Portal Gun. I'll try to give an account of what we know from the material that Aperture recently made available and from what can be deduced from demonstrations of the product.
Sir Martin Rees said this right after receiving a huge pile of money from the Templeton Foundation:
[…]I think just as religion is separate from science, so is ethics separate from science. So is aesthetics separate from science. And so are many other things. There are lots of important things that are separate from science.
I just read Brian Dunning's post about the Fukushima explosion and was about to comment there but they are blocking comments from behind proxies, which is incredibly stupid on their part. So there, new post.