At what point in the future is there going to be a mission to mars to collect core samples?

If you dug a hole down into the surface of Mars, would the temperature be warmer than the surface or colder? If it was warmer, would it be viable as a location for a habitat for future human explorers?

Did Mars lose it's atmosphere because it doesn't have a spinning core or a liquid core?

Mars has an iron core right? and Earth has a nickel core does this difference have any bearing on Mars' lack of atmosphere? and does this create a different magnetic field?

Earth has a crust, mantle, and core, so what layers does Mars have?

Do the orbiters have any instruments that can map out the underground features and core of Mars?

Does the core of Mars really contain solid iron?

Does Mars have a core and a mantle like those of Earth? How have differences in the two planets' internal structures shaped their history?