UCMP Web Time Machine (Popularity: ): A geologic timescale from the UC Berkeley Museum of Paleontology. Institute of Arctic and Alpine Research (Popularity: ): Quaternary paleoecology site from the University of Colorado, Boulder's Scott Elias Pliocene (Popularity: ): A short background. The Cenozoic Era (Popularity: ): An overview of the era from the UC Berkeley Museum of Paleontology. The Age of Mammals (Popularity: ): An overview of Cenozoic mammalian evolution. The Mesozoic Era (Popularity: ): An overview of the era from the UC Berkeley Museum of Paleontology. The Mesozoic Era (Popularity: ): Introduction to the common animals and plants of the Mesozoic. Also includes details about Mesozoic stratigraphy. The Triassic Period (Popularity: ): An overview of the period from the UC Berkeley Museum of Paleontology. A Preliminary Biomechanical Analysis of Phytosaur Life Habits (Popularity: ): A brief article, with photo of skeletal reconstruction, of this Triassic animal. The Cretaceous Period (Popularity: ): An overview of the period from the UC Berkeley Museum of Paleontology. The Permian Mass Extinction (Popularity: ): Discusses the geologic setting, possible causes, and taxa affected by the extinction event at the end of the Paleozoic.