Computer models of extremely complex processes. I shudder.
Lets hope they are more reliable than their "climate models".
I'm a little skeptical of the "science" behind this partcular claim. I'm not aware of very much physical evidence that survives the period in question. Also, the article almost seems to state the the formation of the solar system was a small amount of time - almost like it was a fixed point in time, rather than a continuous process that probably took quite a long time to "complete" itself. That may just be the inaccuracies you find any time a reporter gets hold of a story to mangle. Personally, I would kind of imagbine that when you are speaking of the geologic timescales that would be needed to form a solar system, a 30-150 million year range is not very large in the overall scheme of things.