I want to know the answer to the following question:
Where were native earthworms killed by glaciers?
All the background I'm provided with is that "In the glaciated areas of North America, for example, almost all native earthworms are thought to have been killed by the glaciers and the worms currently found in those areas are all introduced from other areas, primarily from Europe, and, more recently, from Asia.". Is that enough to answer the question?