Published in Nautilus, in 1998, in volume 111, pages 22-44

Published in Nautilus, in 1998, in volume 111, pages 53-84

Published in Nautilus, in 1998, in volume 111, pages 119-142

Published in Nautilus, in 1998, in volume 111, issue 2, pages 47-52

Published in Nautilus, in 1998, in volume 112, pages 6-33

Published in Nautilus, in 1998, in volume 112, pages 52-57

Published in Nautilus, in 1998, in volume 112, pages 63-68

Published in Nautilus, in 1998, in volume 112, pages 69-72

Published in Nautilus, in 1998, in volume 112, pages 95-98

Published in Nautilus, in 1998, in volume 112, pages 109-112

Published in Nautilus, in 1998, in volume 112, pages 113-116

Published in Nautilus, in 1998, in volume 112, pages 117-119