NASA is asking for the public's help, but there's a catch. Mercury's surface is seen in exaggerated color in this image provided by NASA. NASA/JHU APL/CIW — -- NASA is asking for the public's ...

A new study has used an alternative method to work out how much Mercury has shrunk since its formation, finding that the planet has gotten significantly cooler in its first 4.5 billion years. Back in ...

When MESSENGER studied Mercury it uncovered a crater that defied every scientific model. This story reveals why it shocked ...