I watched the entire serial, and the first part Ancient civilization seems the most powerful. At times, it sounds a bit drunk but it is pretty entertaining.
Director
Jennifer Athena Galatis
Gaia is a non narrative film documentary exploring our relationship with earth, religion our habitats around the world and the environment. It took 3 years to make the movie and the producers traveled to Greenland, Jerusalem, Jordan, Canada, NYC, Peru, Argentina, Brazil and many other places to capture our societies and nature.
There are too many things to include in a review, I can only say that I enjoyed watching it and as for the factual background check it is a matter of the science. Anyways they done the great job with the Ancient Civilizations and maybe Missing Links, but other parts are not so impressive.