Hello Nick -

Just checking here. I'm pretty sure that you now understand that whenever a very large impactor, whether cometary or asteroidal, hits Mars, things do change very significantly for quite a while before it returns to its stasis state -

Also, I don't know whether or not you know that these things occur on a roungly 26 million year basis on Mars, as they do on Earth -

Finally, did you ever dig up those images of the straight line valleys on Mars which were created by the heat thrown off from low flying impactors and near misses?

Thoroughly enjoyed your analysis of the need for moons in the EP as a prerequisite for intelligent life. I don't remember, but did you mention that a molten core and magnetosphere are needed for protection of a body from the radiation of its star?

EP