In 1906, evidence of a prehistoric meteorite impact was discovered in northern Sweden outside the town of Kitkiojarvi. The impact occurred over 1 billion years ago, and glacial processes brought fragments of it close to the Muonio River. It came to be known as the Muonionausta meteorite, an iron meteorite originating from the core of its parent body, which is estimated to have fragmented nearly 400 billion years ago, making this one of the oldest known meteorites on Earth, nearly as old as the Solar System itself.
