Scientists have created a simple hydrogel 'brain' capable of playing and improving at the classic video game Pong.
This breakthrough demonstrates the potential for even basic materials to exhibit complex, adaptive behaviours typically associated with living systems or sophisticated AI.
Key Takeaways
- A hydrogel, a water-rich gel, has been developed to play and improve at Pong.
- The hydrogel's ability to remember and adapt opens new avenues for research.
- This development could simplify the creation of algorithms for neural networks.
The Hydrogel 'Brain'
Researchers at the University of Reading have developed a hydrogel based on an electro-active polymer (EAP). These polymers change their size or shape when an electric current is applied, making them useful for actuators and sensors. The hydrogel's ability to remember previous movements and adapt its behaviour was a key focus of the study.
How It Works
The hydrogel was interfaced with an adapted version of Pong via an electrode array. The researchers used electrical stimulation to inform the gel of the ball's position and measured the flow of ions to gauge the paddle's position. Over time, the hydrogel's performance improved, resulting in longer rallies.
Memory and Adaptation
The hydrogel's memory is based on the movement of ions within its matrix. When an electric current is applied, the ions move, causing the gel to change shape. This movement leaves a 'memory' that influences future movements, similar to muscle memory in living organisms.
Potential Applications
This discovery opens up exciting possibilities for developing new types of 'smart' materials that can learn and adapt to their environment. It could also offer a simpler way to develop algorithms for neural networks, which are currently based on biological structures.
Future Research
The next step for researchers is to determine whether the hydrogel can be trained to perform other tasks. While the current study shows that memory is emergent within the hydrogel, further research is needed to demonstrate that learning is occurring.
Conclusion
The development of a hydrogel 'brain' that can play and improve at Pong is a significant milestone in material science. It highlights the potential for simple materials to exhibit complex behaviours, paving the way for future innovations in smart materials and AI.
Sources
- Scientists Build a Simple Gel 'Brain' That Learns How to Play Pong Better : ScienceAlert, ScienceAlert.
- Scientists enable hydrogel to play and improve at Pong video game | Research and development | The Guardian, The Guardian.
