Updated

New analysis of Mercury's surface composition found far less silicon dioxide than previously assumed, indicating the planet experienced a hotter, more extensive volcanic history than scientists had believed. The findings suggest ancient lava on Mercury originated from deeper and more thoroughly melted regions of the planet's mantle. The research draws on data related to missions studying Mercury's composition, adding to a growing picture of the planet's dynamic geological past and offering new insight into how rocky planets close to the sun evolve over billions of years.