Mercury's Shrinking Surface Reveals Wrinkles

New research suggests that Mercury, the closest planet to the Sun, is still shrinking. As its interior cools down, the rock and metal of the planet contract, causing the surface to develop "thrust faults" or wrinkles. The age of these faults has been difficult to determine, but recent evidence indicates that many of them have continued to move in geologically recent times. The upcoming BepiColombo mission aims to confirm these findings and provide more insight into Mercury's geological activity.