The Ice Age on Earth was caused by Q diverting an asteroid into the Sol system (The Q Continuum)

Which ice age? There have been at least five major ones.
The Chicxulub impact is theorised to have caused a significant drop in Earth's temperature, leading to the mass extinction of the dinosaurs. This wasn't a true ice age if it is correct, some scientists theorise that the Chicxulub impact would have raised the temperature.
I was thinking the same thing. As most people only think or know about the most recent one, I assumed it would be that one.
Yeah, I was thinking about the event that's theorised to have caused the extinction of the dinosaurs. This is if it actually caused a ice age and was indeed connected with the extinction of the dinosaur species. Since it's the most popular theory, I went with that rather than just say that Q caused the extinction of the dinosaurs when he diverted an asteroid, because I don't think the entire dinosaur species would be living within the impact range.
Unless it made planet fall, I'm not sure how an asteroid being diverted into the system would cause problems on Earth given the shear amount of them in the system already.
An asteroid did impact the Earth leaving behind a crater 180km's in diameter near Chicxulub, Mexico. I'm not a geologist, but I would assume that an impact that size would cause a significant amount of chaos throughout the world.