Signs of active geology discovered on Mercury 402 bright bands have been discovered on the surface of Mercury, indicating ongoing geological processes. An analysis of 100,000 images taken in 2011 and 2015 revealed that the structures are most often located on the sunward slopes of craters. This suggests that the planet is not completely "dead" and continues to evolve. The bands are formed by heat flow and volatiles, including sulfur, that rise from the interior through cracks in the rock. Most of them originate in depressions, called gullies, associated with gas emissions. These findings are planned to be verified using new data from ESA and JAXA missions.