Science fiction loves to show us disembodied heads or brains floating in jars, but could this be one route to extending our lives? Or could you already be one living in false reality? FBI director ...

All the chocolate spread, that kind of jar. Well that's what you're inside right now, mate. And you're just a horrible, wee wrinkly brain. DAVEY:How am I a brain in a jar exactly, when I'm sitting ...