I thought this said coronavirus killed the dinosaurs at first glance... I'm going to change my answer to that; Coronavirus killed the dinosaurs. Edit, but wait...
Everyone knows that the dinosaurs got extinct due to their heightened spiritual evolution. First to go were the carnivore ones. After realising all the pain and distress they were causing with their violent eating habits, in an attempt to turn vegan some died out of hunger, while others due to food poisoning. The herbivore ones got so platonic and lost in their philosophical conversations that they stopped having sex. They were ok with that. They were ok with getting extinct as well. What's the reason for going on anyways? Last but not least were the omnivores. They were the real victims. They got extinct out of hunger, soon after the last herbivore has died. They had no choice. There's a conspiracy theory saying that it was all a set-up by the pescaterians. They say that they might still be lurking at the darkest, unexplored depths of the sea, planning their next move.