Thawed 50-Year-Old Sheep Semen (VIDEO) University of Sydney This video is under embargo. Please login to access this video. To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Caption Sheep semen thawed after 50 years under a microscope. Credit University of Sydney Usage Restrictions For this story only 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.