The scientists has successfully brought back dinosaurs, at first. It was all hell, carnivores and herbivores everywhere. People being eaten by carnivores or scared off by herbivores, T-Rex’s where the worlds lions, Raptors where the ‘wolves’(cus they’re in packs), Compies where the rats of the Dino world and etc. But after many many years humans and dinosaurs got used to it, carnivores are in remote areas with herbivores, if someone spots a carnivorous near civilization. They should call ‘Carnivore Removal Emergency Services (CRES)’ and get it removed back to where it belongs, if you don’t get spotted first, easy enough, there’s also ‘Herbivore Removal Emergency Services’ (HRES) which is the same thing but just for herbivores that are agitated or hostile and need to remove for safety. Most herbivores are allowed to roam wherever and if someone gets the right paperwork then you can have a pet herbivore, of course there’s illegal breeding etc. Police used large herbivores like stegos and ankylosaurus, the military uses herbivores, carnivores, and flying dinosaurs. Other then that the world has rehoused the ages of dinosaurs, even extinct plants and things started to regrow from the dinosaurs droppings (somehow idk) and people can buy the plants to feed their herbivores, there’s even dinosaur veterinarians, and there’s a few sports. Air Racing with flying type dinosaurs exist, rat hunting events with trained Compies exist and other dinosaur sports. Of course modern world animals exist as well still, dinosaurs are just added to the food chain.