BANGOR, Maine, April 19 -- Husson University issued the following news release: Husson University announced today that the world renowned ecologist, paleobiologist, and conservationist Dr. Jeremy Jackson will be speaking at the Gracie Theatre on Monday, April 22 at 7 p.m. as part of the educational institution's Earth Day celebrations. The event is free and open to the public. This is the inaugural lecture in what will be an annual sustainability lecture series. Widely regarded as one of the   more