This image, released in 1996, is a composite long-exposure picture of one of the darkest parts of the night sky.
8.1 Origin of the Universe The Hubble Deep Field. This Earth history will focus on the major physical and biological events in each Eons and Era. This chapter will cover briefly the origin of the universe and the 4.6 billion year history of Earth. The main topics studied in Earth history are paleogeography, paleontology, and paleoecology and paleoclimatology-respectively, past landscapes, past organisms, past ecosystems, and past environments. Looking back in time, an untrained eye would see many unfamiliar life forms and terrains. Throughout the long history of Earth, change has been the norm. Ga=billion years ago, Ma=million years ago.Entire courses and careers have been based on the wide-ranging topics covering Earth’s history. Geologic time on Earth, represented circularly, to show the individual time divisions and important events. Describe the Cenozoic evolution of mammals and birds, paleoclimate, and tectonics that shaped the modern world.Describe the Mesozoic evolution and extinction of birds, dinosaurs, and mammmals and tectonics and sedimentation associated with the breakup of Pangea.