The Archaeverse is quite empty, except for one gigantic planet in its center which is called Prehistorico, after the fact that it contains a very large amount of prehistoric creatures. However, these creatures are extremely large, larger than what physics should allow. These creatures are often called "Gigamorphs", due to their immense size.
The creatures that reside on this planet also show similar behavior to their ancient counterparts, back in our own universe. They are completely unaware of their enormous size, too.
Basically, if you enter this verse, you better be wary of predators, since they can literally fit entire Yottaverses in their mouths, in fact, they can hold a gigantic amount of them, over 1 nonillion even!