as far as I know, Yes Dinosaurs did existed
existed. as in, "dinosaurs existed on this world years ago"
people and dinosaurs never co-existed
Yes. Worms existed long before dinosaurs did.
Dinosaurs existed millions of years ago.
No. Bears came well after the period of the dinosaurs. Bears never existed when the dinosaurs were around.
Dinosaurs
Yes, sharks existed on Earth before the dinosaurs.
It doesn't. Dinosaurs were unknown by the people who wrote the Bible.
No, the dinosaurs died out long before mammoths existed.
None, dinosaurs preceeded dogs by millions of years.
The dinosaurs existed as they evolved best to fit the ecological niches of the day.