Possible 2014 comet impact to Mars could make it habitable.

Speculation here that such an impact could make Mars habitable:

Rush to Mars: Comet impact could make Red Planet inhabitable.
Published time: February 28, 2013 16:32
http://rt.com/news/mars-comet-tito-flyby-601/

Bob Clark

I think it might cause a phase change towards being more habitable but i really doubt a single comet of this size could make it habitable if we wanted to terraform Mars relatively quickly i think you would need quite a few more comets preferably ones with i high nitrogen ice content along with water etc. and also come in on a less violent trajectory.

Yeah, A single comet won't do much and it still doesn't address the main reason why Mars is as inhospitable as it is, not enough mass and magnetic field to retain enough atmosphere. Even if you could bombard Mars with enough material to puff up the atmosphere, it would steadily bleed off back into space.

A comet impact would be very interesting from a scientific perspective though to see what kind of effects it caused, such as if any of it made it to the ground, especially any water or ice and if it hung around long enough to create the erosion effects we see there.

With the asteroid mining companies contemplating orbital changes to asteroids I wonder if orbital changes to comets is feasible. Could we find enough to relatively quickly add a few hundred thousand gallons of water to Mars?

A few hundred thousand tons of water in orbit around Mars would be more useful.