Yes, but robotic missions are strictly limited on what science they can attempt, while a human with even a modest lab can do quite a bit more in the same amount of time. And, while we attempt to keep robots clean, do not kid yourselves that they aren't bringing contaminants to Mars.
Some analysis has suggested that, if you're trying to find out if there's native life quickly, before you've totally contaminated the place, a manned mission might well be superior to a long line of robotic ones.
There's just that pesky problem that sending a person out to Mars to die isn't acceptable PR for NASA.
Some analysis has suggested that, if you're trying to find out if there's native life quickly, before you've totally contaminated the place, a manned mission might well be superior to a long line of robotic ones.
There's just that pesky problem that sending a person out to Mars to die isn't acceptable PR for NASA.