Based on the scientific equipment on Beagle 2 and the planned or possible activities/experiments is there anything it would or could have done that has not been done since?
In other words, if Beagle 2 had been successful, what might we know about Mars that we we don't know now?
Edit: (Thanks to @WayneConrad for the feedback) What I'd like to know is based on the experiments that Beagle 2 was equipped to carry out, would these experiments have answered any questions that cannot now actually be answered by any other Mars missions? And what are these currently unanswered questions (if any)?