From the Black Death to the plague and now the hantavirus, rats are always somehow related to disease. Cardiologist and epidemiologist Dr. Christopher Labos on how they got here, how they spread disease and why it's nearly impossible to get rid of them all together.

Are you looking for a summer job?
06:21

The C.A.Q. get a boost in the polls & Alberta’s separatism push gets messier
06:46

Getting ready for the grill? It’s all about the marinade!
07:08