La Paz Icefield 02342 (IMAGE) Naval Research Laboratory Caption US Naval Research Laboratory researchers Rhonda Stroud and Bradley De Gregorio found evidence of an ancient comet building block, using an advanced scanning transmission electron microscope, inside a meteorite collected in Antarctica. The finding provides insight into the formation of the solar system. The work was funded by NASA. Credit US Naval Research Laboratory 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.