Scientists have uncovered evidence suggesting that water played a role in volcanic activity over three billion years ago, according to a study led by Adelaide University. The research, published in Nature Communications, analyzed ancient rocks from the Pilbara Craton in Western Australia. These rocks provided clues that water had once traveled deep into the Earth's interior, contributing to the formation of magma that powered ancient volcanoes. This discovery suggests that Earth may have been recycling water between its surface and interior much earlier than previously thought. Dr. Eric Vandenburg, a geochemist from Adelaide University, explained that these ancient rocks offer a rare chance to study conditions on Earth from billions of years ago. At that time, the Earth was much hotter, and the movement of tectonic plates—now a key driver of geological activity—had not yet begun. Scientists were unsure whether surface water could have traveled deep into the Earth so long ago. However, the study found clear evidence that significant amounts of water had indeed reached the Earth's interior, influencing the formation of volcanic rocks. The researchers propose that a process known as "dripduction" may have transported water into the mantle before modern plate tectonics existed. In this process, dense, water-rich sections of the Earth's outer crust would periodically sink into the hotter mantle, carrying water with them. As these crustal fragments descended, they released their water into the mantle, which then contributed to the creation of magma. This mechanism may have been an early way for water to move between Earth's surface and its interior. This discovery addresses a major question in geology: when did the movement of materials between Earth's surface and its deep interior begin? Understanding this process could help scientists better grasp how Earth's continents formed and how the planet evolved into its current state. The study was a collaborative effort involving researchers from Adelaide University, Monash University, the Geological Survey of Western Australia, Curtin University, the Australian National University, Cardiff University, and the GEOMAR Helmholtz Center for Ocean Research in Germany.