Hydrogels can learn to play Pong
Briefly

"Our research shows that even very simple materials can exhibit complex, adaptive behaviors typically associated with living systems or sophisticated AI. This opens up exciting possibilities for developing new types of 'smart' materials that can learn and adapt to their environment."
"Hydrogels are soft, flexible biphasic materials that swell but do not dissolve in water. This unique property allows for diverse applications, making them useful in everything from soft contact lenses to drug delivery systems."
Read at Ars Technica
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