"This could be the chance to try out my new Enlarging Ray! But we'll need a guinea pig." -Professor Farnsworth.
The Enlarging Ray was an invention created by Professor Farnsworth. It was created to make things substantially larger than their normal size. Farnsworth used it enlarged Zoidberg so hea counter attack the giant Bender.
It was featured in a "What-If?" scenario, so it is unknown whether Professor Farnsworth actually invented it.