The Tully Monster Mystery The Tully Monster is a mysterious 307myr-old marine animal known only from the famous Mazon Creek fossil locality in Illinois. Its body plan is unlike any other animal that has ever […]

The Tully Monster Mystery The Tully Monster is a mysterious 307myr-old marine animal known only from the famous Mazon Creek fossil locality in Illinois. Its body plan is unlike any other animal that has ever […]