Meet Medusoid, an artificial jellyfish that can swim like a real one.
Scientists created the “pseudo-organism” from rat heart muscle cells and a piece of silicone membrane with eight appendages.
When the test-tube jellyfish was set free in a container of salty water, and electrically shocked to start its lab-grown heart tissue contracting, it began to propel itself along.
Just what the world needs. Jelly rats.