BBC News: 'Cloaking device' idea proposed.
The cloaking devices that are used to render spacecraft invisible in Star Trek might just work in reality, two mathematicians have claimed. They have outlined their concept in a research paper published in one of the UK Royal Society's scientific journals. Nicolae Nicorovici and Graeme Milton propose that placing certain objects close to a material called a superlens could make them appear to vanish. It would rely on an effect known as "anomalous localised resonance". However, the authors have so far only done the maths to verify that the concept could work. Building such a device would undoubtedly pose a significant challenge.
Cloaking is nifty. Star Trek transporter beams aren't going to work though.
Update 27 May
BBC News: Plan for cloaking device unveiled.