From the Telegraph:
However, anyone hoping that the machine will become a powerful new weapon could be disappointed, scientists have only proven the effect on worms.
A phaser traditionally emits a beam capable of stunning or killing an enemy.
Researchers have now found a way to paralyse tiny worms when they expose them to ultraviolet light.
Even when the ultraviolet light was turned off the animals stayed stunned.
However, if they were subsequently exposed to a different form of light they recovered again and were able to move.
[Read more at the Telegraph]