21:43 no. Certain dinosaurs like velocitaptors can't be cloned due to the half life of DNA. Even if a mosquito that is preserved in amber with the DNA is futile. The extinction of certain dinosaurs is permanent. They wouldn't even last that long due to the change in environment (the extinct ones). By certain dinosaurs i mean non-avian dinosaurs. Avian dinosaurs like birds exist today. A velociraptor is not avian. It was feathered and small. The imitation in one of the irrelevant pictures is unrealistic.