Listening to the 18-minute musical monologue has been a Thanksgiving tradition among folk music fans for decades.
The Monarch butterfly migration is the longest known insect migration on earth. Flight of the Butterflies in 3D tells the story of a determined scientist who spent 40 years trying to discover exactly where the butterflies mysteriously went when they flew south for winter.
Dr. Fred Urquhart is the man obsessed with Monarchs. The obsession started in his youth, when he began to wonder where the butterflies spent the winter months. His passion became his profession as he went on to become a zoologist/biologist, teacher and university professor.
Along with his wife Norah, Urquhart founded the Insect Migration Association, enlisting thousands of volunteers across North America to tag hundreds of thousands of butterflies to track their migration route. This association ultimately helped Dr. Urquhart discover, in 1975, that millions of butterflies migrated to the remote Transvolcanic Belt of central Mexico.
Experts share a range of perspectives on how to combat the Islamic State militant group, and the role the U.S. should play.