Mercury is shrinking faster than we thought. What's going on inside of it?

Wrinkles on the surface of Mercury have revealed that the closest planet to the sun is shrinking faster than scientists thought.New research suggests that Mercury is shrinking between 10% and 30% faster than had been previously estimated. The team behind this research calculated that the planet has lost nearly 12 miles (19 kilometers) of its total diameter since it formed. The researchers think that the extremity of this shrinking has gone unnoticed previously because bombardment from space rock