It is much easier to say that you are 10 years old than 315,360,000 seconds old. That's why paleonotologists use time periods. It's easier to say a dinosaur lived during the Cretaceous than to say it is about 80,000,000 years old. They were present on the earth for 165 million years of the earth's 4.6 billion year history. While they lived, they dominated the land more than any other animal has ever dominated its environment.
Humans dominate the earth today.
But our species has only been on the earth for about 1.5 million years. It would take another 163 million years of dominance by humans to equal the accomplishment of the dinosaurs.