Hey, JH, I seem to know more than you at any rate.
It has been proven, they released Gases on the moon...they dispersed and headed off to the nearest black hole...or so we think, the point is, they didn't stick around. There is no gravitational field to keep them there and thus float off where ever they want to. Water, sticks together in space (as an example of what a gas does) but it will jut by a tiny momentum drift off forever never reaching it's target. That's what I mean.
Gases cannot stick to a planet unless there is a gravitational field keeping them there. The gases only stay on earth because of the gravity and the spin (or so says Stephen Hawkins)
I theorized and implosion, because an explosion would completely wipe out the planet of the magnitude I was talking about. An implosion would be something that created an astronomical amount of heat in a contained area this will theoretically heat up the core and thus get the tectonic plates of Mars moving again. This would create fusion inside the planet, where energy is constantly being recycled.
Once the planet has heated up, the gravitational field from inside the core will be generated from the huge masses of metal that turn magnetic once they are molten...go ask a chemist and not a drug chemist either. Something like electrolysis, yet in gases. We know little about gravity, but what we do know we can use, especially if we know something about magnetism.
That gravity, will then draw in outside dust particles that contain seeds of life as I'd like to call them. The heat will heat up the Ice caps on mars, and the rivers and oceans will flow once more, these seeds, or organisms will grow and eventually begin the process of photosynthesis. Eventually this will terraform the planet, although this will take billions of years.