CGI has come on by leaps and bounds over the last few years but creating something like a CGI saber tooth cat is still down to a lot of (artistic) interpretation (ditto the faces created in Meet the Ancestors). The bit about how the saber teeth actually worked though was interesting and I guess the more finds that are made and the more research that is done the clearer the picture will become.

I was hoping that there'd be more on the human effect on these big beasties (and their possible contribution to their extinction) but there was nothing - nothing at least until the very end of the prog when a short trailer for the next episode was run. Looking forward to that one.