23rd Jul 2012 4:07pm | By Dan Thorne
It's a fascinating breakthrough in the world of biology - a man-made jellyfish called Medusoid has been created from the heart cells of a rat.
The biological engineering wonder was created by scientists from Harvard University and California Institute of Technology who are attempting to construct human hearts for transplants.
The scientists studied the movements of a young moon jellyfish and recreated the creature using silicone rubber and living rat heart cells. The movement seen in the video below is as a result of electric currents passed through the water tank.
Kit Parker from Harvard told The Guardian "When I said I want to build a jellyfish, my collaborators looked at me like I was out of my mind."
"The jellyfish is really simple, and we're going to do one that's a bit harder, and then a bit harder still, and so on, with our long-term goal to build a heart."