I sat alone in the back of the Twin Otter, two empty fuel barrels, two all-terrain vehicles and piles of luggage separating me from the pilot and co-pilot. Although my husband Jody Tinsley and I had intended to fly together when we left the Flashline Mars Arctic Research Station, a series of quick events had me traveling alone. Not cushy, sitting in the back of an island-hopping Twin Otter in the Arctic, but pretty cool.