Temperate zone plants occurred above the Arctic Circle during the Early Cenozoic and Alligators and tortoises lived above 77 o N latitude. Astronomical phenomena, such as a shallower tilt in the Earth ...
Oak (genus Quercus), comprising approximately 469 species of ornamental and timber trees and shrubs in the beech family ...
3 min read At the dawn of the Paleogene—the beginning of the Cenozoic era—dinosaurs, pterosaurs, and giant marine reptiles were conspicuously absent from the face of the Earth. Rodent-size ...