In this episode the relation between the size of creatures and evolution will be explained. The reasons of how evolution leaded to creatures as big as whole building or as small as a thumbnail will be given. Are there any natural limits for the size of animals in this planet? If so, what are them?
Series Review:
Approximately 99% of all species that ever existed on earth have become extinct. There is

In this episode the evolution of sex in relationship with the survival of the species will be exposed. From the most basic to the most complex, and perhaps till it is not anymore needed, this documentary gives a comprehensive scope on the topic.
Series Review:
Approximately 99% of all species that ever existed on earth have become extinct. There is a violent competition taking place every day in our planet

Eyes are of mayor importance for many species in order to survive. Discover how eyes evolved from light sensitive cells from jellyfish to the ones you are using to read this text. This episode was nominated for an Emmy for Outstanding Science!
Series Review:
Approximately 99% of all species that ever existed on earth have become extinct. There is a violent competition taking place every day in our planet