Lava Flow (IMAGE) Virginia Tech Caption Esteban Gazel, a geoscientist at Virginia Tech, collects samples of lava in a variety of locations in the world, in this photo, Etna, Italy, to probe the chemical evolution of the planet. Credit Virginia Tech 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.