" N.I.B.I.R.U " Rumor being the dinosaurs died from an ''Ice Age"?

what did cause this 'ice age' ? Where is the factual proof ... ? And, what are the after effects and the 'present effects'

''IF'' im wrong about the ''ice age'' being the end of the dinosaurs.. what are the other therioes ? ?

Is it possible.. that a passing planet had anything to do with the culling of species here on Earth?