A 300 million-year-old fossil, previously thought to be the world's oldest octopus, has been reevaluated by scientists. The fossil's true identity is unclear, with some reports suggesting it may be a nautilus, while others imply it could be a land animal that ate plants or even a vertebrate land dweller. The discovery appears to have significant implications for the understanding of ancient life forms, but the exact nature of the fossil remains uncertain.