News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only. (IMAGE)

Higher Education Press

News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only.

Caption

 News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only.

Credit

Higher Education Press

Usage Restrictions

none

License

Original 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.