KRWG Primetime Highlights 12/21/11

7pm    NATURE - CHRISTMAS IN YELLOWSTONE

Wolves, coyotes, elk, bison, bears and otters make their way through their most challenging season.

8pm    NOVA - WHAT DARWIN NEVER KNEW

Watch What Darwin Never Knew on PBS. See more from NOVA.

Questions what really drives evolution, what turns one species into another and how humans evolve.