Researcher Amanda D. Hanford at Pennsylvania State University has created a real cloaking device that can route sound waves around an object, making it invisible to some sensing techniques. From the r
"Cloaking" sounds sci-fi, but it's actually a trick used today by spammers to show content moderators or search engine spiders an innocent-looking version of their site while real visitors just see ad
<img src="http://www.crunchgear.com/wp-content/uploads/2009/01/thecloak.jpg" />
<a href="http://people.ee.duke.edu/~drsmith/index.html">Researchers at Duke University</a> have hit another milestone i