Danish physicists have created the smallest record in the world.

Its diameter is 40 micrometers. It features 25 seconds of the classic Christmas song Rockin' Around the Christmas Tree. The audio track was applied using the new Nanofrazor nanostructured machine. It allows you to engrave 3D patterns at nano resolution on tiny surfaces. The technology allows researchers to create new quantum devices, magnetic sensors and electronic optics. They can be used, among other things, to detect currents in brain research.