Cambrian Period spans 538.8-485.4 million years ago. Divided into four stratigraphic series named after Cambrian System. System was initially overlain by Silurian System. Boundary dispute resolved with Ordovician system in 1879
Created by PippenFTS in April 2020 to recreate Earth in 1:1 scale. Project has over 6,000 registered builders through Discord server. Initially allowed only Java Edition, later expanded to Bedrock
Oxygen was absent in Earth's atmosphere before photosynthesis. Small amounts of oxygen were released by geological and biological processes. Oxygen began accumulating in atmosphere at 1.85 Ga during Great Oxygenation Event
Two-hour special aired on History Channel in December 2007. Narrated by Edward Herrmann, focusing on Earth's geological history. Released on DVD in 2008 and Blu-ray in 2009
Ice age is a long period of reduced Earth temperature with ice sheets. Earth is currently in Quaternary glaciation, with last glacial period ending 11,700 years ago. Glacial periods are cold, interglacials are warm periods within ice ages
Earth formed 4.54 billion years ago from solar nebula accretion. Moon formed from collision with planet-sized Theia 4.53 billion years ago. Early atmosphere contained almost no oxygen, volcanic outgassing created oceans. First continents appeared 4.0 billion years ago, forming cratons