What was on Earth before dinosaurs?

What intriguing mysteries does the history of our planet hold before the rise of the mighty dinosaurs? As we delve into the depths of time, we are confronted with the question: What was Earth like before these colossal creatures dominated the landscape? Were there other life forms that preceded them, perhaps even more bizarre and fascinating? How did the environment and climate differ from what we see today? And what cataclysmic events, if any, led to the decline of these earlier inhabitants and paved the way for the dinosaurs to emerge? Let's embark on a journey through prehistory, seeking answers to these captivating questions.