Today's Green Radio Hour includes looks into the future and the past. Paula Ehrlich is CEO and President of the E.O. Wilson Biodiversity Foundation and director of the Half Earth Project. Tune in this week to a virtual conversation celebrating Half Earth Day, as scientists and educators continue to look at a tomorrow where half of the planet is set aside for species continuation. And Sam Merrett calls in from the Hudson River and the deck of the 'Apollonia,' as they set out on a full weeks' run delivering malt, grain and more by sail.