North America. After the North American glacier began retreating from New England, some species, such as earthworms, still took millennia to slowly repopulate the ecosystem. By the time Europeans arrived, the earthworms had not yet returned.
North America. After the North American glacier began retreating from New England, some species, such as earthworms, still took millennia to slowly repopulate the ecosystem. By the time Europeans arrived, the earthworms had not yet returned.