Global Worming

An invasive earthworm is wriggling its way across the country, and quickly. Some of these jumping worms have been found as far north as Minnesota. This migration has experts really worried as most gardeners are conditioned to welcome earthworms as good for the soil. Annise Dobson–a researcher in Yale's School of Forestry and Environmental Studies–has been tracking these invasive worms. (Originally aired Feb 11, 2020).