Michael Mosley uses the BBC archives to chart scientists' progress as they probed the mind of the murderer to try to understand why people kill, and whether it can help prevent it. Show more
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To meet the government's emissions reductions targets, we'll need to make big changes to the way we live, travel and eat. But how much difference will these changes really make? Show more
Cats v Dogs: Which Is Best?
Episode 2
59 minutes
First broadcast: on BBC Two ScotlandLatest broadcast: on BBC Two Wales HD
Chris Packham and Liz Bonnin battle it out to find out whether cats or dogs are the better animal. The final round looks at whether cats and dogs really love us. Show more
Cats v Dogs: Which Is Best?
Episode 1
59 minutes
First broadcast: on BBC Two ScotlandLatest broadcast: on BBC Two Wales
Chris Packham and Liz Bonnin battle it out to find out whether cats or dogs are the better animal. Round one tests whether either species can understand numbers. Show more
Series exploring topical scientific issues. A look at the fledgling field of extraterrestrial meteorology, as technology allows astronomers to study other planets in new ways. Show more