TIL: Native North American earthworms disappeared more than 10,000 years ago, when glaciers from a Pleistocene ice age wiped them out. New earthworms began entering North America as early as the 1600s, with the first European settlers. They crossed over in root balls or the dry ballast of ships.

Read more: https://ecosystemsontheedge.org/earthworm-invaders/#:~:text=New%20earthworms%20began%20entering%20North,going%20on%20under%20their%20feet.

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