Is "rock snot" the next invasive species threat in the Adks?

(06/09/10) Researchers say the invasive algae didymo, widely called "rock snot," is spreading throughout Vermont and the Lake Champlain basin. Found last week east of Burlington, the algae could make its way into Adirondack waterways, and once it establishes a presence, it's just about impossible to control or eradicate. Scientists say the algae forms large mats along the bottom of waterways and chokes out native plants. Martha Foley has more.