http://www.ecowatch.com/10-interesting-facts-about-earthworms-1881871982.html The glaciers that crawled across Canada into the northern tier of the lower 48 states during the most recent ice age wiped out earthworms in those areas. In other parts of the U.S., you may find native earthworm species, but the worms living in the regions scoured by glaciers are invaders from overseas, brought here intentionally … Continue reading THE LOWLY EARTHWORM