Computer modelling has been used to trace the evolution of a cluster of space onjects known as the Baptistina family. The paper claims that one of these objects was the cause of the Chicxulub crater.
http://news.bbc.co.uk/1/hi/sci/tech/6980468.stm
I'm slightly dubious about that claim (it's just a 'probable' type of statement) but if it gets your work into Nature...
Geologists are gneiss!!
