Henriksson wrote:
What is so important about actual people being on Mars? Let's be honest, unmanned vehicles are far better to use.
Veeeee-eeee--eeery simply put, just my first thoughts, which can be subject to change:p :
I think it's all got to do with the feeling of unity, being invincible/powerful/the first.
I'd think it's a very rare thing for humans to land on another planet with their own two feet, so when one eventually does after a lot of hard work... I think it gives humans the feeling that they are invincible. Nothing will stop them. It's progress.
Seeing that it *is* a human and not, say, a dog landing on that planet... It makes other people relate to that, because they're the same species. Resulting into unity. I mean, I bet millions upon billions of people were all glued to the tv during the first moon landing.
Other than that, a robot/machine cannot tell about the emotional experiences of landing on said planet... and I think a lot of people are also interested in that e.g.: how it felt stepping on there (daunting, marvelous), what it's like being the first person (amazing, unbelievable), what it looked liked, (dreary, magical, etc.). I mean, sure you can get pictures/video's/data of it, but it's not the same as hearing it described in someone's own first hand experience words.
Though, I have no idea what that'd contribute to science, except from a psychological point of view, perhaps (brains....IN SPACE

^_-).