When the earth was still young. You know like when you first come to earth in Terranigma, where living organisms are looking strange and most of the planet is still deserted.
Also, somehow the early 70s and 80s.
Did you watch Walking with Monsters as a kid?
Don't know, there was a time when dinosaurs were the shit in the early 90s and I also was into it. Buying the magazines where parts were included to build your own T-Rex. For some years there was a Dinomania day once a year were only Dinosaur stuff was running on the TV.