This week on Animal Instinct, host Celia Kutcher is going nuts for squirrels! Welcoming the one of the country's experts on the small mammal, Dr. John L.

Carmen Devito and Alice Marcus Krieg are talking about the Columbian Exchange on this week's episode of We Dig Plants. But don't misconstrue this discussion as a celebration! On the phone is culinary horticulturist and historian Scott D.