Flea in Amber (IMAGE) Oregon State University Caption This flea preserved about 20 million years ago in amber may carry evidence of an ancestral strain of the bubonic plague. Credit (Photo by George Poinar, Jr., courtesy of Oregon State University) Usage Restrictions None 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.