...where were the glaciers? And the mammoths, cave bears, giant sloths and sabertooths? The large hooved animals that existed then? They showed homo sapiens, but not Neanderthals which also lived here at that time. There was a lot of life on this planet and conditions in the environment that would bring huge challenges to the people of Galactica, especially when they were giving up their technology. Guess they didn't have any budget left over to show more than modern mammals on the plains.