Why Were Animals Bigger In Prehistoric Times?

Why were prehistoric animals so much bigger than the animals alive today? From giant sauropod dinosaurs to the massive Megalodon and dragonflies with huge wingspans, the ancient Earth was ruled by giants. In this video, we explore what made them grow so large, and what changed. In this video you will discover: - How oxygen levels, climate, and food supply shaped animal size - Why giants evolved on land, in the sea, and in the air - What happened to the giants, and why we don't see them today If you enjoy learning about evolution, ancient life, and how the world used to look, subscribe for new videos. TIMESTAMPS 0:00 Introduction (Add your own timestamps here after the video is finished) #PrehistoricAnimals #Evolution #Megafauna #Dinosaurs #Science