Scientists in the United States have reported that they have created the world's first living robots from frog embryo stem cells from scratch. Are they "already" living creatures or organisms, or "just" machines, built by chance also from living cells? In any case, a microscopic robot made mainly from stem cells evokes a bit of Frankenstein thought ...

Cells were carefully assembled under a microscope based on thousands of designs created by a supercomputer artificial intelligence algorithm at the University of Vermont and collected by microsurgeons at Tufts University in Massachusetts. Tests have shown that they can move towards a target and possibly move a small object. Natural cell download and release acts as a kind of mini engine.

To be alive, xenobots need to be preserved in the aquatic environment. According to Kriegman, robots now last about ten days. When they have exhausted all their energy, they naturally die and disintegrate into dead skin cells. However, putting it in a nutrient-rich environment could extend its life.

It is believed that millimeter robots could one day be used to deliver drugs to the human body or to collect microplastics in the oceans.

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