Pine Butterflies; Radon; Open Water Swimming
Season 23 Episode 2308 | 28m 30s
Pine Butterflies - A mass outbreak of pine butterflies creates a virtual snowstorm in the forest in August. Radon - We look into the causes and consequences of radon in our region. Open Water Swimming - Swimmers from 18 to 80 compete across open water lakes.
Aired: 02/02/12
