Bill Chalker

Bill Chalker is a leading UFO researcher based in Sydney, Australia, with a background in chemistry and mathematics. He has contributed to such publications as Rolling Stone and Reader's Digest , and has written a book, The OZ Files , about the Australian UFO story.

Bill Chalker is a leading UFO researcher based in Sydney, Australia, with a background in chemistry and mathematics. He has contributed to such publications as Rolling Stone and Reader's Digest , and has written a book, The OZ Files , about the Australian UFO story. See less