Come join us for a free guided hike to learn from a GTM Research Reserve interpretive guide where the restless sand comes from and where it's going in its refusal to just stay put. Learn about coquina rocks, dune flowers, sea birds, shells and the humble gopher tortoise who digs deep burrows and comes out to dine on prickly pears along the dunes. Bring your camera for possible sightings. Meet at GTM Marineland Office. The reserve is located at the…