Lake Junin coring platform (IMAGE) University of Florida Caption Researchers and drilling operators worked around the clock for seven weeks, drilling 100 meters into Lake Junin, high in the Peruvian Andes. Working in two 12-hours shifts, scientists collected the to help them create a record of glacial changes that stretches back nearly 1 million years. Credit Charlie Casey Usage Restrictions no 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.