Scientists have succeeded in "cloaking" an object perfectly for the first time, rendering a centimetre-scale cylinder invisible to microwaves.
Many "invisibility cloak" efforts have been demonstrated, but all have reflected some of the incident light, making the illusion incomplete.
A Nature Materials study has now shown how to pull off the trick flawlessly.
However, the illusion only works from one direction and would be difficult to achieve with visible light.
