John Schwartz writes in the New York Times:
Invisibility has long been the stuff of fantasy, from Plato's story of the ring of Gyges to Harry Potter's mischief-enabling cloak. But scientists led by a team at Duke University have demonstrated a technology that could be a small step in the right misdirection.
The system, a set of concentric copper circles on fiberglass board, deflects electromagnetic waves of a specific frequency that strike it, without much of the scattering and absorption that make reflections and shadows.
A result is that the microwaves slide around the structure like water flowing around a smooth rock in a stream, said David R. Smith, a professor of electrical and computer engineering at Duke and an author of the paper published today in the journal Science.
reg-free Link to NYT piece, and here's the report summary in Science magazine (full text for subscribers only).
