A team of engineers in Europe has created a device that can move small objects with sound waves, much like the tractor beams popular in science fiction.

Thanks to a team of engineers in Europe, yet another amazing machine has made the transition from science fiction to just plain science. 
Their invention is a device that can move small objects with sound waves.
Though the mechanism’s ability is somewhat similar to a UFO’s tractor beam – the ray of light that sucks hefty objects up into the ship - it isn’t powerful enough to move large objects like cows. 
That’s fine, though, as the intended applications require a rathe