Earth Not Destroyed Only Once, Civilization May Have Restarted
Earth existed for about 4.5 billion years. Most of that time, humans were not present. Species appeared, lived for millions of years, then disappeared. Their marks are in fossils and rock layers. When many species worldwide disappeared in a short geological time, it's called a mass extinction.
Earth existed for about 4.5 billion years. Most of that time, humans were not present. Species appeared, lived for millions of years, then disappeared. Their marks are in fossils and rock layers. When many species worldwide disappeared in a short geological time, it's called a mass extinction.
Earth existed for about 4.5 billion years. Most of that time, humans were not present. Species appeared, lived for millions of years, then disappeared. Their marks are in fossils and rock layers. When many species worldwide disappeared in a short geological time, it's called a mass extinction.
Earth existed for about 4.5 billion years. Most of that time, humans were not present. Species appeared, lived for millions of years, then disappeared. Their marks are in fossils and rock layers. When many species worldwide disappeared in a short geological time, it's called a mass extinction.
Earth existed for about 4.5 billion years. Most of that time, humans were not present. Species appeared, lived for millions of years, then disappeared. Their marks are in fossils and rock layers. When many species worldwide disappeared in a short geological time, it's called a mass extinction.
Earth existed for about 4.5 billion years. Most of that time, humans were not present. Species appeared, lived for millions of years, then disappeared. Their marks are in fossils and rock layers. When many species worldwide disappeared in a short geological time, it's called a mass extinction.