Quote of the Day

From Slate's science roundup column:

Scientists claim to have built an 'invisibility cloak.' It uses metamaterials (metal patterns on a surface) to bend waves around an object so that the waves strike you as though they've passed through empty space. Researchers' hype: We can hide anything from anyone! We hid a copper cylinder, and now we're gonna hide a toaster! Sci-fi hype: Today, Harry Potter's cloak; tomorrow, Romulan space ships! Critiques: 1) The cloak didn't hide anything. It bends microwaves, not light. 2) It worked in two dimensions, not three. 3) Even with microwaves, it left a telltale reflection and shadow. 4) To bend light, which is much harder, you'd have to find new metamaterials. Naive answer: Just you wait, we'll figure out how to hide things, and you'll hear all about it. Cynical answer: The military, which is funding this work, will figure out how to use it to hide things, and you'll never hear about it.