In response to this question: 'Late Veneer' on other planets
Few have brought up the point that it may or may not be on topic. Is it?
I agree that it is on topic, it is all about understanding the processes - be it on Earth, or on another planet. Particularly if we can observe processes that would have implications to Earth-based processes. For example, the question Is Mars' mantle homogeneous or heterogeneous and what might this say about mantle convection? at first glance seems to b about Mars, but links the mantle processes to the Earth.
Yes, It is on topic.
This subject is covered every year at the American Geophysical Union(http://sites.agu.org/). I would say that if this question is outside the scope of this website, then, planetary science as a whole is off topic.
If we were to break this question into a simpler, general term, it could be:
Are there Earth like events on other planets?