User blog comment:ASDFGirl/The Future of Fossils and Archeology: Revival/@comment-29412454-20180725153404/@comment-25118285-20180725183413

No meteor - this is an alternate dimension, after all, not part of the history of the world in which the meteor hit.

"This dimension, called The Past, is part of an alternate-universe where prehistoric creatures of all time periods will spawn together. " So yes, all time periods and all mobs.

If we were to do dino nests, we'd need to redo breeding. We have some ideas on that but we're not sure if/when we'd redo it.