Mercury’s surface once exploded in volcanoes
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/04/ticker_Mercury_free.jpg?fit=860%2C460&ssl=1)
Two volcanic vents (center) on the floor of Mercury’s Kipling crater are shown in this false-color MESSENGER image. Volcanic ash appears in brown.
Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington/Brown University/ NASA