Basically, yeah. Though... with the exception of 'Jurassic Park,' they stayed dead in my world. Granted, that was a movie and didn't actually happen so I am not really sure why I mentioned it.

It's possible that your world did though! You typically find fossils and bones and stuff waaaay deep down in the ground, so it's also possible that nobody in your world ever really found out. [He shrugs.] You just never know.