Aliens: The Dawn of Life on Earth Misnamed
As televised was called "Origins: Battle for Earth"
Describes the back and forth battle for supremacy between arthropods, mollusks, and vertibrates. The back and forth between these groups sometimes affected by mass extinctions is similar to the mammal/dinosaur battle for supremacy. Makes the point that the rise of vertibrates to dominance may have been a fluke do to near extinction at the beginning. On the other hand it also points the basic design differences that assures vertibrate dominance on land.
Regards,
Mark