The Accelerator Mass Spectrometry Laboratory at the University of Arizona (image) University of Arizona Share Print E-Mail Caption Greg Hodgins checks on the accelerator mass spectrometer, which narrowed the age of the book down to 1404 to 1438, in the early Renaissance. Credit Daniel Stolte/UANews Usage Restrictions Usage only granted in conjunction with posting/reporting of this news release. Photo must be credited as shown. Share Print E-Mail 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.