A Brief History of Time (1992)
Starring: Stephen Hawking
Director: Errol Morris
Errol Morris examination of quantum physics for the layperson.

Koyaanisqatsi: Life Out of Balance (1983)
Director: Godfrey Reggio
Mind-boggling documentary/meditation on collapsing life.

Microcosmos (1996)
Starring: Kristin Scott Thomas
Director: Claude Nuridsany, Marie Perennou
More earnest documentary gives close-up view of insect life.

Powaqqatsi: Life in Transformation (1988)
Director: Godfrey Reggio
Follow-up to "Koyaanisqatsi" focusing on man against nature.

Tribulation 99: Alien Anomalies Under America (1991)
Director: Craig Baldwin
Similarly wide-eyed found-footage "documentary" by Craig Baldwin.