Moon's Craters (IMAGE) Southwest Research Institute Caption SwRI was part of a team that used Lunar Reconnaissance Orbiter data to study the moon's craters, scaled by size and color-coded by age here, to understand the impact history of the Earth. The lunar surface is dominated by blue craters younger than 290 million years old, which is consistent with those on Earth, indicating that bombardments on both bodies has increased since that time. Credit Credit: NASA/LRO/USGS/University of Toronto Usage Restrictions Images/videos may be used by the media and the public for educational and informational purposes 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.