Abandoned Mine Pit in Peruvian Amazon (IMAGE) Duke University Caption Thousands of artificial ponds like this one, created when rainwater filled in an abandoned gold mining pit, are amplifying risks of mercury exposure for humans and wildlife in the Peruvian Amazon. Credit Melissa Marchese 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.