Screw of Light (1 of 2) (IMAGE) University of Vienna Caption Screw of light on the 143 km long way between the canary islands of La Palma and Tenerife. Credit Copyright: University Vienna Usage Restrictions The image may only be used with appropriate caption or credit. 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.