Dinosaurs seemed to have generally been so much larger than animals today. Huge dragonflies that dwarf their modern counterparts, turtles 10ft long. What is the mechanism that allowed them to be so large, or conversely makes modern ones smaller? Is it about Oxygen levels, or efficiency, or something else?
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I used to work at one of America’s best tracksites! Basically supply and demand. For a long time the dinosaurs were able to grow larger and larger because there was very little competition for food, predators followed the herbivores and the herbivores followed the plants.
KT marks the shift where the meteor sent the world into a time of darkness and ash, where only the smaller, easier to feed, animals survived. The plants all died and herbivores of dinosaur size couldn’t support their bodies demands and died off, leaving nothing for predators to eat. All land animals of today are descendants of the small survivors.
Tldr: plant life thrived and allowed animals to become giant before they all got vibe checked
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