What is this pen worth? It is made of shiny metal and puts a nice line of ink on paper when used to write. Its value depends on its story. What if I told you there was some writing on the side? That inscription says Venetian/Palazzo...

It has been more than a year since a robot named Curiosity began its work on Mars. Some of the pictures we have seen are just spectacular and trigger the imagination. What would it be like to be there? What does it look like to...