Sleeping Rat (IMAGE) University College London Caption An illustration of a sleeping rat. This was part of a paper published in the open access eLife journal suggesting that rats 'dream' paths to a brighter future. The research at UCL (University College London) found that when rats rest, their brains simulate journeys to a desired future such as a tasty treat. Credit Deepmind Ltd. Usage Restrictions Must be credited appropriately License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.