A material with a real three-hour memory has been discovered.

By materials with a "memory" function, they usually mean those that remember what shape they kept before exposure. But vanadium dioxide (VO2) has gone further - it can remember more than just one state. He remembers as many states as he wants for the past 3 hours. That is, it can be bent, heated, twisted, and it will remember not the last transformation, but the entire chain.