The article focuses on the keyword “What major event happened 1 billion years ago” and addresses the search intent of users looking to learn about significant historical events in Earth’s distant past. It offers informative content that delves into the geological and biological developments that took place around one billion years ago, highlighting the unique life forms and environmental conditions of that era. The article aims to enrich readers’ understanding of Earth’s evolution, making it a valuable resource for webmasters seeking to provide educational content on planetary history.