What made me remember this? Two mathemeticians have published that cloaking may actually be possible. Here's a bit of the article:
Cloaking devices are a form of stealth technology much favoured by Star Trek baddies such as the Romulans and Klingons.
The complex mathematical phenomenon outlined by Milton and Nicorovici closes the gap a little between science fiction and fact.
The phenomenon is analogous to a tuning fork (which rings with a single sound frequency) being placed next to a wine glass. The wine glass will start to ring with the same frequency; it resonates.
The cloaking effect would exploit a resonance with light waves rather than sound waves.
The concept is at such a primitive stage that the scientists talk only at the moment of being able to cloak particles of dust - not spaceships.
In this example, an illuminated speck of dust would scatter light at frequencies that induce a strong, finely tuned resonance in a cloaking material placed very close by.
The resonance effectively cancels out the light bouncing off the speck of dust, rendering the dust particle invisible.
One way to construct a cloaking device is to use a superlens, made of recently discovered materials that force light to behave in unusual ways.