Ditto e-readers, apparently: The Kobo Mini is now going for just $50. I'm impressed by the fact that they make no attempt to lock users into their reader. Sideloading can be done via USB link; there's no card slot. How good their store is I have no idea.
There seems to be evidence that obesity is influenced by gut bacteria. I would take this article a lot less seriously if if weren't well-established that bacteria cause stomach ulcers. Obviously, it's not the whole story, and more research is needed. My conviction that calories don't count remains intact. It's the kind of calories that matter, since everything depends on how the body processes them. (There are lots of calories in sawdust. Eat 3000 calories worth of sawdust a day and get fat? Try it and see!)