1.) Thomas Lalley talks with various attendees of a conference on solar energy about the future of the technology. 2.) Host Peter Berle talks with Thomas Caine of the University of Cincinnati about the Movile cave in Romania and the over 30 new species of animals found there. 3.) Berle talks with Joseph Segui about his work the SPNI or Society for Preservation of Nature in Israel. 4.) In the segment "Earth Calendar", Berle talks with Jim Parkhurst of Virginia Tech about the great horned owl.