**The origin of Forrest the Hedgehog can be traced back to the Cretaceous Period 65 million years ago**. During that period, there were many dinosaurs and other giant reptiles living on the earth, which posed a huge threat to small mammals. To survive in this environment, hedgehogs' ancestors evolved a unique defense mechanism: they grew hardened hairs on their skin, forming spines.

The above information is for reference only. It is recommended to read fairy tale books to obtain more comprehensive and accurate information.